AskDefine | Define fasts

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  1. Plural of fast


  1. third-person singular of fast

Extensive Definition

Fasting is primarily the act of willingly abstaining from some or all food, drink, or both, for a period of time. A fast may be total or partial concerning that from which one fasts, and may be prolonged or intermittent as to the period of fasting. Fasting practices may preclude sexual activity as well as food, in addition to refraining from eating certain types or groups of foods; for example, one might refrain from eating meat.
Fasting for religious and spiritual reasons has been a part of human custom since pre-history. It is mentioned in the Bible, in both the Old and New Testament, the Qur'an, the Mahabharata, and the Upanishads. Fasting is also practiced in many other religious traditions and spiritual practices.
Fasting is also used in a medical context to refer to the state achieved after digestion of a meal. A number of metabolic adjustments occur during fasting and many medical diagnostic tests are standardized for fasting conditions. For most medical purposes a person is assumed to be fasting after 8-12 hours. A diagnostic fast refers to prolonged fasting (from 8-72 hours depending on age) conducted under medical observation for investigation of a problem, usually hypoglycemia. Fasting has occasionally been recommended as a therapeutic intervention by physicians of many cultures, though it is uncommonly resorted to for this purpose by modern doctors.

Religious fasting

Bahá'í Faith

In the Bahá'í Faith, fasting is observed from sunrise to sunset during the Bahá'í month of `Ala' (between March 2 through March 20). Bahá'u'lláh established the guidelines in the Kitáb-i-Aqdas. It is the complete abstaining from both food and drink (including abstaining from smoking). Observing the fast is an individual obligation, and is binding on all Bahá'ís who have reached the age of maturity, which is 15 years of age.


Buddhist monks and nuns following the Vinaya rules commonly do not eat each day after the noon meal, though many orders today do not enforce this. This is not considered a fast, but rather a disciplined regimen aiding in meditation. Fasting is generally considered by Buddhists as a form of asceticism and as such is rejected as a deviation from the Middle way. However, the Vajrayana practice of Nyung Ne is based on the tantric practice of Chenrezig. It is said that Chenrezig appeared to Gelongma Palmo, an Indian nun who had contracted leprosy and was on the verge of death. Chenrezig taught her the method of Nyung Ne in which one keeps the eight precepts on the first day, then refrains from both food and water on the second. Although seemingly against the Middle Way, this practice is to experience the negative karma of both oneself and all other sentient beings and, as such is seen to be of benefit. Other self-inflicted harm is discouraged.
Perhaps due to sectarian differences, some lineages of Buddhism consider taking the eight precepts, even for a limited period of time, to be a fast. In fact, they are occasionally referred to as "fasting precepts." The eight precepts closely resemble the ten vinaya precepts for novice monks and nuns. The novice precepts are the same with the prohibition against handling money. (For further information, see The Way to Buddhahood: Instructions from a Modern Chinese Master by Venerable Yin-shun.)


The "acceptable fast" is discussed in the biblical Book of Isaiah, chapter 58:3-7, and is discussed metaphorically. In essence, it means afflict the soul through abstaining from fulfilling the needs or wants of the flesh. The blessings gained from this are claimed to be substantial. Christian denominations that practice this acceptable fast often attest to the spiritual principles surrounding fasting and seek to become a testament to those principles. The opening chapter of the Book of Daniel, vv. 8-16, describes a partial fast and its effects on the health of its observers. Fasting is a practice in several Christian denominations or other churches. Other Christian denominations do not practice it, seeing it as a merely external observance, but many individual believers choose to observe fasts at various times at their own behest, and the Lenten fast observed in the Catholic Church and the Eastern Orthodox Church is a forty day partial fast to commemorate the fast observed by Christ during his temptation in the desert.

Biblical accounts of fasting

  • Moses fasted for forty days and forty nights while he was on the mountain with God. (Exodus 34:28)
  • King David fasted when the son of his adulterous union with Bethsheba was struck sick by God, in punishment for the adultery and for David's murder of Bathsheba's husband, Uriah the Hittite. Nevertheless, the son died, upon which David broke his fast (2 Samuel 12:15-25).
  • King Jehosaphat proclaimed a fast throughout Judah for victory over the Moabites and Ammonites who were attacking them (2 Chronicles 20:3).
  • The prophet Isaiah chastised the Israelites in Isaiah 58 for the unrighteous methods and motives of their fasting. He clarified some of the best reasons for fasting and listed both physical and spiritual benefits that would result.
  • The prophet Joel called for a fast to avert the judgement of God.
  • The people of Nineveh in response to Jonah's prophecy, fasted to avert the judgement of God (Jonah 3:7).
  • The Jews of Persia, following Mordechai's example, fasted due to the genocidal decree of Haman. Queen Esther declared a three-day fast for all the Jews prior to risking her life in visiting King Ahasuerus uninvited (Esther 4).
  • The Pharisees in Jesus' time fasted regularly, and asked Jesus why his disciples did not. Jesus answered them using a parable (Luke 5:33-39, Matthew 9:14-15, Mark 2:18-20, see also Mark 2).
  • Jesus also warned against fasting to gain favor from men. He warned his followers that they should fast in private, not letting others know they were fasting (Matthew 6:1618).
  • Jesus fasted for forty days and forty nights while in the desert, prior to the three temptations (Matthew 4:2, Luke 4:2).
  • Jesus said : But this kind (of demon) does not go out except by prayer and fasting. (Matthew 17:21)
  • And he (Jesus) said unto them (disciples), This kind (of demon) can come forth by nothing, but by prayer and fasting. (Mark 9:29)
  • The prophetess Anna, who proclaimed the birth of Jesus in the Temple, fasted regularly (Luke 2:37).
  • There are indications in the New Testament as well as from the Apocryphal Didache that members of the Early Christian Church fasted regularly.

Roman Catholicism

For Roman Catholics, fasting is the reduction of one's intake of food to one full meal (which may not contain meat during Fridays in Lent) and two small meals (known liturgically as collations, taken in the morning and the evening). Eating solid food between meals is not permitted. Fasting is required of the faithful on specified days. Complete abstinence is the avoidance of meat for the entire day. Partial abstinence prescribes that meat be taken only once during the course of the day. To some Roman Catholics, fasting still means consuming nothing but water.
Pope Pius XII had initially relaxed some of the regulations concerning fasting in 1956. In 1966, Pope Paul VI in his apostolic constitution Paenitemini, changed the strictly regulated Roman Catholic fasting requirements. He recommended that fasting be appropriate to the local economic situation, and that all Catholics voluntarily fast and abstain. In the United States, there are only two obligatory days of fast - Ash Wednesday and Good Friday. The Fridays of Lent are days of abstinence: those observing the practice may not eat meat. Pastoral teachings since 1966 have urged voluntary fasting during Lent and voluntary abstinence on the other Fridays of the year. The regulations concerning such activities do not apply when the ability to work or the health of a person would be negatively affected.
Prior to the changes made by Pius XII and Paul VI, fasting and abstinence were more strictly regulated. The church had prescribed that Roman Catholics observed fasting and/or abstinence on a number of days throughout the year.
In addition to the fasts mentioned above, Roman Catholics must also observe the Eucharistic Fast, which involves taking nothing but water and medicines into the body for one hour before receiving the Eucharist during the Mass. The ancient practice was to fast from midnight until Mass that day, but as Masses after noon and in the evening became common, this was soon modified to fasting for three hours. Current law requires merely one hour of eucharistic fast, although some Roman Catholics still abide by the older rules.


The Book of Common Prayer prescribes certain days as days for fasting, but since the separation of the Church of England from the Roman Catholic Church, there have not been regulations prescribing the mode of observance of these days. Observance of fast days declined until the 19th century, when under the influence of the Oxford Movement many Anglicans began once again taking the prescribed fast days more seriously.
In the process of revising the Book of Common Prayer in various parts of the Anglican Communion the specification of abstinence or fast for certain days has been retained, though because each province is free to set its own calendar, there is no universal Anglican rule for which days are fast days. Generally Lent and Fridays are set aside. Often the Ember Days or Rogation Days are also specified, and the eves of certain feasts.
Individual Anglicans are free to determine for themselves what particular measures of abstinence they will follow in the observance of these days.

Eastern Orthodoxy & Eastern Catholicism

For Eastern Orthodox and Eastern Catholics, there are four fasting seasons, which include Nativity Fast, Great Lent, Apostles' Fast and Dormition Fast.
Wednesdays and Fridays are also fast days throughout the year (with the exception of fast-free periods). In some Orthodox monasteries, Mondays are also observed as fast days (Mondays are dedicated to the holy Angels, and monasticism is called the "angelic life").
Fasting during these times includes abstention from animal products (meat and often fish or dairy products), olive oil (or all oils, according to some Orthodox traditions), and wine (which is often interpreted as including all alcoholic beverages). Many Orthodox and Eastern Catholics begin Great Lent by abstaining from all food for some period of time. The very young and very old, as well as those for whom fasting would endanger their health, are exempt from the strictest fasting rules.
Fasting can take up a significant portion of the calendar year. The idea is not to suffer, but to use the experience to come closer to God, to realize one's excesses, and to engage in almsgiving. Fasting without increased prayer and almsgiving (donating to a local charity, or directly to the poor, depending on circumstances) is considered useless or even spiritually harmful by many Orthodox Christians.
Those desiring to receive Holy Communion keep a total fast from all food and drink from midnight the night before (see Eucharistic discipline).
Certain festal periods are fast-free, meaning that fasting is forbidden, even on Wednesdays and Fridays (though fasting before Holy Communion is never relaxed, except for health reasons). These periods are:
  • The 12 days from the Nativity of Christ to Theophany (Epiphany)
  • The week of the Publican and the Pharisee (which is the week that falls exactly two weeks before the beginning of Great Lent each year)
  • The week following Pascha (Easter), usually called "Bright Week"—and during the 50 days from Easter Sunday to Pentecost, the fasting laws are lessened, wine and oil being permitted even on Wednesdays and Fridays
  • The week following Pentecost

Oriental Orthodox Churches

With exception of the Fifty days following Easter in the Coptic Orthodox Church fish is not allowed during Lent, Wednesdays, Fridays, and Baramon days. Other than that Fish and Shellfish are allowed during Fasting days.
The discipline of fasting entails that apart from Saturdays, Sundays, and Holy feasts should keep a total fast from all food and drink from midnight the night before to a certain time in the day usually three O'clock in the afternoon (the hour Jesus died on the Cross). Also, it is preferred to practice the reduction of one's daily intake of food (typically, by eating only one full meal a day).

Protestant churches

In Protestantism, the continental Reformers criticized fasting as a purely external observance that can never gain a person salvation. The Swiss Reformation of the "Third Reformer" Huldrych Zwingli began with an ostentatious public sausage-eating during Lent.
In more recent years, many churches affected by liturgical renewal movements have begin to encourage fasting as part of Lent and sometimes Advent, two penitential seasons of the Liturgical Year.
Likewise, Lutheran churches encourage fasting during lent. They also encourage it before partaking in the Eucharist, as Luther writes in his Small Catechism: Who, then, receives such Sacrament worthily? Fasting and bodily preparation is, indeed, a fine outward training; but he is truly worthy and well prepared who has faith in these words: Given, and shed for you, for the remission of sins.
Members of the Anabaptist movement (e.g. Amish, Mennonite, Hutterite, et al.) generally fast, but in private. The practice is not regulated by ecclesiastic authority.
Other Protestants consider fasting, usually accompanied by prayer, to be an important part of their personal spiritual experience, apart from any liturgical tradition. The United Methodist fast in the old Wesleyan way of sundown to sundown on Mondays to Tuesdays and Thursdays to Fridays to promote discipline among Christ's followers.


Individuals in mainline Pentecostal denominations undertake both short and extended fasts as the Spirit leads them. In the Normal Fast pure water alone is consumed. During the "Black Fast" nothing, not even water is consumed. Dr. Curtis Ward writes that the Black Fast should never extend beyond three days because of ketosis, possible kidney damage, and dehydration. He further states that in no New Testament scriptures did they extend this type of fast beyond that limitation and that Christ's fast included water because "he was afterward an hungred" and was offered bread. If he had abstained from water he would have obviously craved water first and foremost. Dr. Ward states that the Black Fast, Hebrew Fast, and the Absolute Fast are synonymous terms. The former Arthur Wallis coined the term "Absolute Fast" in 1968 in his book "God's Chosen Fast." In addition to the Normal Fast and the Black Fast Pentecostals sometimes undertake what they call the Daniel Fast (or Partial Fast) in which only one type of food (ie, fruit or fruit and non starchy vegetables) is consumed.


For Charismatic Christians fasting is undertaken at the leading of God. Fasting is done in order to seek a closer intimacy with God, as well as an act of petition. Some take up a regular fast of one or two days a week as a spiritual observance. Holiness movements, such as those started by John Wesley, Charles Wesley, and George Whitefield in the early days of Methodism, often practice such regular fasts as part of their regimen.

The Church of Jesus Christ of Latter-day Saints

Latter-day Saint fasting is total abstinence from food. Adherents are encouraged to fast for two consecutive meal times once a month, and the first Sunday of the month is usually designated a Fast Sunday. The money saved by not having to purchase and prepare meals is to be donated to the church as a fast offering, which is to be used to help people in need. The late LDS President Gordon B. Hinckley asked: “What would happen if the principles of fast day and the fast offering were observed throughout the world[?] The hungry would be fed, the naked clothed, the homeless sheltered. … A new measure of concern and unselfishness would grow in the hearts of people everywhere.” (“The State of the Church,” Ensign, May 1991, 52–53.)
Sunday worship meetings on Fast Sunday include opportunities for church members to publicly express thanks and to bear their testimony of faith.
Fasting is also a way for LDS to show God that their spirit comes before their body. They may also fast to show a sign that they are ready to repent, or it may be part of their repentance process.


Fasting is a very integral part of the Hindu religion. Individuals observe different kinds of fasts based on personal beliefs and local customs. Some are listed below.
  • Certain days of the week are also set aside for fasting depending on personal belief and favorite deity. For example, devotees of Shiva tend to fast on Mondays, while devotees of Vishnu tend to fast on Fridays or Saturdays.
  • Thursday fasting is very common among the Hindus of northern India. On Thursdays devotees listen to a story before breaking their fast. On the Thursday fasters also worship Vrihaspati Mahadeva. They wear yellow clothes, and meals with yellow colour are preferred. Women worship the banana tree and water it. Food items are made with yellow-coloured ghee.
  • Fasting during religious festivals is also very common. Common examples are Maha Shivaratri or the 9 days of Navratri (which occurs twice a year in the months of April and October/November during Vijayadashami just before Diwali, as per the Hindu calendar). Karwa Chauth is a form of fasting unique to the northern part of India where married women undertake a fast for the well-being, prosperity, and longevity of their husbands. The fast is broken after the wife views the moon through a sieve after sunset.
  • In the state of Andhra Pradesh, the month of Kaarthika, which begins with the day after Deepavali is often a period of frequent (though not necessarily continuous) fasting for some people, especially women. Common occasions for fasting during this month include Mondays (for Lord Shiva), the full-moon day of Karthika and the occasion of Naagula Chaviti.
Methods of fasting also vary widely and cover a broad spectrum. If followed strictly, the person fasting does not partake any food or water from the previous day's sunset until 48 minutes after the following day's sunrise. Fasting can also mean limiting oneself to one meal during the day and/or abstaining from eating certain food types and/or eating only certain food types. In any case, even if the fasting Hindu is non-vegetarian, he/she is not supposed to eat or even touch any animal products (i.e. meat, eggs) on a day of fasting. (Milk is an exception for animal products).


In Islam, fasting for a month is an obligatory practice during the holy month of Ramadan, from fajr (dawn), until maghrib (sunset). Muslims are prohibited from eating, drinking, smoking, and engaging in sexual intercourse while fasting. Fasting in the month of Ramadan is one of the Pillars of Islam, and thus one of the most important acts of Islamic worship. By fasting, whether during Ramadan or other times, a Muslim draws closer to their Lord by abandoning the things they enjoy, such as food and drink. This makes the sincerity of their faith and their devotion to God (Arabic:Allah) all the more evident.
The Qur'an states that fasting was prescribed for those before them (i.e., the Jews and Christians) and that by fasting a Muslim gains taqwa, which can be described as the care taken by a person to do everything God has commanded and to keep away from everything that He has forbidden. Fasting helps prevent many sins and is a shield with which the Muslim protects him/herself from jahannam (hell).
Muslims believe that fasting is more than abstaining from food and drink. It also includes abstaining from any falsehood in speech and action, from any ignorant and indecent speech, and from arguing and fighting, and lustful thoughts. Therefore, fasting helps develop good behavior.
Fasting also inculcates a sense of fraternity and solidarity, as Muslims feel and experience what their needy and hungry brothers and sisters feel. However, even the poor, needy, and hungry participate in the fast. Moreover, Ramadan is a month of giving charity and sharing meals to break the fast together.
While fasting in the month of Ramadan is considered Fard (obligatory), Islam also prescribed certain days for non-obligatory, voluntary fasting, such as:
  • each Monday and Thursday of a week
  • the 13th, 14th, and 15th day of each lunar month
  • six days in the month of Shawwal (the month following Ramadan)
  • the Day of Arafat (9th of Dhu al-Hijjah in the Hijri (Islamic calendar))
  • the Day of Ashura (10th of Muharram in the Hijri calendar), (Only Sunni Muslims fast on this day. In Shia Islam it is prohibited. For Shias, the Day of Ashura is only for the mourning of the grandson of the Prophet)
Fasting is forbidden on these days:
  • Eid Fitr (1st Shawwal) and Eid Adha (10th Dzulhijjah)
  • Tashriq (11th, 12th, 13th Dzulhijjah)
Although fasting is fard, exceptions are made for persons in particular circumstances:
  • Prepubescent children; though some parents will encourage their children fast earlier for shorter periods, so the children get used to fasting.
  • Serious illness; the days lost to illness will have to be made up after recovery.
  • If one is traveling, since the fajr and maghrib times will change; but one must make up any days missed upon arriving at one's destination.
  • Women who are pregnant or nursing.
  • A woman during her menstrual period; although she must count the days she missed and make them up at the end of Ramadan.
  • A ill person or old person who is not physically able to fast. They should donate the amount of a normal persons diet for each day missed if they are financially capable.
Penalty of in purpose fast breaking at Ramadan:
  • For elders whom will not be able to fast, for each day, a lunch meal or an equivalent amount of money for each to be donated to poor or in need people.
  • Also if some one lies, or swear and did not keep the promise or what he swear about, for redemption, fasting three days, or donate Ten lunch meals or an equivalent amount of money to the poor or in need people.
  • If someone breaks his fast on purpose without any excuse, some sayings tell that he cannot ever be excused and/or forgive, but most of Islamic opinions say that its salvation / redemption is to fast sixty days successively (two months) without missing a day.


There are many types of fasting in Jainism. One is called Chauvihar Upwas, in which no food or water may be consumed until sunrise the next day. Another is called Tivihar Upwas, in which no food may be consumed, but boiled water is allowed. The main goal of any type of Fasting in Jainism is to achieve complete Non-Violence (दया, ahimsa) during that period. Fasting is usually done during Paryushana but can be done during other times. If one fasts for the eight days of Paryushana, it is called Atthai, and when it is for One Month, it is known as Maskhamana. Also, it is common for Jains not to fast but only to limit their intake of food. When a person only eats lentils and tasteless food with salt and pepper as the only spices, the person is said to do Ayambil. This is supposed to decrease desire and passion.
Self-starvation by fasting is known as Sallekhana and is supposed to help shed karma according to Jain philosophy. Another form of fasting is Santhara, the Jain religious ritual of voluntary death by fasting. Supporters of the practice believe that Santhara cannot be considered suicide, but rather something one does with full knowledge and intent, while suicide is viewed as emotional and hasty. Due to the prolonged nature of Santhara, the individual is given ample time to reflect on his or her life. The vow of Santhara is taken when one feels that one's life has served its purpose. The goal of Santhara is to purify the body and, with this, the individual strives to abandon desire.


Fasting for Jews means completely abstaining from food and drink, including water. Brushing teeth is forbidden on the major fast days of Yom Kippur and Tisha B'Av (See below), but permitted on minor fast days. Taking medications is generally not permitted, except where a doctor's orders would forbid abstaining. Observant Jews fast on up to six days of the year. With the exception of Yom Kippur, fasting is never permitted on Shabbat, for the commandment of keeping Shabbat is biblically ordained and overrides the later rabbinically-instituted fast days. Yom Kippur is the only fast day which is explicitly stated in the Torah.
Yom Kippur is considered to be the most important day of the Jewish year and fasting as a means of repentance is expected of every Jewish man and boy above the age of bar mitzvah and every Jewish woman and girl above the age of bat mitzvah. It is so important to fast on this day, that only those who would be put in danger by fasting are exempt, such as the ill, elderly, or pregnant or nursing women, as endangering one's life is against a core principle of Judaism. Those that do eat on this day are encouraged to eat as little as possible at a time and to avoid a full meal. For some, fasting on Yom Kippur is considered more important than the prayers of this holy day. If one fasts, even if one is at home in bed, one is considered as having participated in the full religious service. In addition to fasting and prayer, Yom Kippur -- as the "Sabbath of Sabbaths" -- has the same restrictions regarding work as the Sabbath, such as striking a fire, carrying objects outside the home, using tools, and so on. Traditionally, leather shoes are not worn on this day. Men may wear a white gown (kittel) over their clothes, symbolic of a burial shroud on this Day of Judgement. Women may either wear all white, or they may simply wear a large white scarf over their heads, and many do not put on make-up or jewelry. The aura of the day is serious, humble, sacred and repentant, yet happy in the knowledge that sincere repentance brings redemption.
The second major day of fasting is Tisha B'Av, the day nearly 2000 years ago on which the Romans destroyed the Holy Temple in Jerusalem and the Jews were banished from their homeland. Tisha B'Av ends a three-week mourning period beginning with the fast of the 17th of Tammuz. Unlike the fast of Yom Kippur, there are no restrictions on activities, although one should try to avoid doing regular work the first part of the day, sit in a low chair or on the floor, and wear no leather shoes. This is also the day when observant Jews remember the many tragedies which have befallen the Jewish people, including the Holocaust. The atmosphere of this holiday is serious and deeply sad.
Both of these holy days are considered major fasts and are observed from sunset to sunset the following day by both men and women. The remaining four fasts are considered minor and fasting is only observed from sunrise to sunset. Men are expected to observe them, and women should observe them, but a rabbi may often give dispensions if the fast represents too much of a hardship to a sick or weak person.
On the two major fast days sexual relations are also forbidden.
Other fast days are:
Minor fast days, not universally observed, include:
It is traditional for a bride and groom to fast on their wedding day before the ceremony as the day represents a personal Yom Kippur. In some congregations, repentance prayers that from the Yom Kippur service are included by the bride and groom in the service before the ceremony.
Aside from these official days of fasting, Jews may take upon themselves personal or communal fasts, often to seek repentance in the face of tragedy or some impending calamity. For example, a fast is sometimes observed if the scrolls of the Torah are dropped. The length of the fast varies, and some Jews will reduce the length of the fast through tzedakah, or charitable acts. Mondays and Thursdays are considered especially auspicious days for fasting.

Purpose of fasting in Judaism

Judaism views three essential potential purposes of fasting, and a combination of some or all of these could apply to any given fast. One purpose in fasting is the achievement of atonement for sins and omissions in Divine service. Fasting is not considered the primary means of acquiring atonement; rather, sincere regret for and rectification of wrongdoing is key (see Isaiah, 58:1-13, which appropriately is read as the haftorah on Yom Kippur).
Nevertheless, fasting is conducive to atonement, for it tends to precipitate contrition in the one who fasts (see Joel, 2:12-18). This is why the Bible requires fasting (lit. self affliction) on Yom Kippur (see Leviticus, 23:27,29,32; Numbers, 29:7; Tractate Yoma, 8:1; ibid. (Babylonian Talmud), 81a). Because, according to the Hebrew Bible, hardship and calamitous circumstances can occur as a result of wrongdoing (see, for example, Leviticus, 26:14-41), fasting is often undertaken by the community or by individuals to achieve atonement and avert catastrophe (see, for example, Esther, 4:3,16; Jonah, 3:7). Most of the Talmud's Tractate Ta'anit ("Fast[s]") is dedicated to the protocol involved in declaring and observing fast days.
The second purpose in fasting is commemorative mourning. Indeed, most communal fast days that are set permanently in the Jewish calendar fulfil this purpose. These fasts include: Tisha B'Av, Seventeenth of Tammuz, Tenth of Tevet (all of the three dedicated to mourning the loss of the destroyed Temple in Jerusalem), and Fast of Gedaliah. The purpose of a fast of mourning is the demonstration that those fasting are impacted by and distraught over earlier loss. This serves to heighten appreciation of that which was lost. This is in line with Isaiah (66:10), who indicates that mourning over a loss leads to increased happiness upon return of the loss:
Be glad with Jerusalem, and exult in her, all those who love her; rejoice with her in celebration, all those [who were] mourners over her.
The third purpose in fasting is commemorative gratitude. Since food and drink are corporeal needs, abstinence from them serves to provide a unique opportunity for focus on the spiritual. Indeed, the Midrash explains that fasting can potentially elevate one to the exalted level of the Mal'achay HaSharait (ministering angels) (Pirkei d'Rabbi Eliezer, 46). This dedication is considered appropriate gratitude to God for providing salvation. Additionally, by refraining from such basic physical indulgence, one can more greatly appreciate the dependence of humanity on God, leading to appreciation of God's benificience in sustaining His creations. Indeed, Jewish philosophy considers this appreciation one of the fundamental reasons for which God endowed mankind with such basic physical needs as food and drink. This is seen from the text of the blessing customarily recited after consuming snacks or drinks:
You are the Source of all blessing, O' Eternal One, our God, King of the universe, Creator of many souls, who gave [those souls] needs for all that which You created, to give life through them to every living soul. Blessed is the Eternal Life-giver.


Sikhism does not promote fasting except for medical reasons. The Sikh Gurus discourage the devotee from engaging in this ritual as it is considered to "brings no spiritual benefit to the person". The Sikh holy Scripture, Sri Guru Granth Sahib tell us: "Fasting, daily rituals, and austere self-discipline - those who keep the practice of these, are rewarded with less than a shell."(Guru Granth Sahib page 216). So most Sikhs have never undertaken a fast of any kind.

Medical fasting

People can also fast for medical reasons, which has been an accepted practice for many years. One reason is to prepare for surgery or other procedures that require anesthetic. Because the presence of food in a person's system can cause complications during anesthesia, medical personnel strongly suggest that their patients fast for several hours (or overnight) before the procedure.
Another reason for medical fasting is for certain medical tests, such as cholesterol testing (lipid panel). People are often asked to fast so that a baseline can be established. In the case of cholesterol, the failure to fast for a full 12 hours (including vitamins) will guarantee an elevated Triglyceride measurement.
It has been shown in many empirical, scientific studies that fasting can improve health and help to eliminate a variety of diseases. Although some fasting methods use juice or various amounts of food, the health of such methods is questionable, according to Dr. Joel Fuhrman. A true fast, he contends, consists of an intake solely of water, and can last (healthily) for extended periods of time when undertaken with the correct knowledge. Any fasts of such nature should be preceded and followed by a healthy diet, and should also be supervised by a knowledgeable physician to make sure that deficiencies of any nutrients do not take place and retract from the healthful benefits of such a fast
Some doctors believe that pure water fasting can not only detoxify cells and rejuvenate organs, but can actually cure such diseases and conditions as cardiovascular disease, rheumatoid arthritis, asthma, high blood pressure, type 2 diabetes, colitis, psoriasis, lupus and some other autoimmune disorders when combined with a healthy diet. They believe that "Fasting is Nature's Restorer." There is empirical evidence to corroborate the beliefs of these scientists.
Recent studies on mice show that fasting every other day while eating double the normal amount of food on non-fasting days led to improved insulin and blood sugar control, neuronal resistance to injury, and health indicators superior to mice on 40% calorie restricted diets. Alternate day calorie restriction may prolong lifespan and attenuate diseases associated with inflammation, oxidative stress and aging.
People near the end of their lives sometimes consciously refuse food and/or water. The term in the medical literature is patient refusal of nutrition and hydration.
In naturopathic medicine, fasting is seen as a way of cleansing the body of toxins and dead or diseased tissues, and giving the gastro-intestinal system a rest. Such fasts are either water-only, or consist of fruit and vegetable juices.
Common terms used in research are: reduced diet therapy (RDT), Fasting Therapy (FT) and caloric restriction (CR). Research tends to originate from Russia, Japan and Germany.

Political fasting

Fasting is often use as a tool to make a political statement, to protest or to bring awareness to a cause.
Notable annual events of such a nature are the famine events developed by World Vision to bring donation and awareness to end world poverty and hunger.
Activists have also used fasting to bring attention to a cause and to pressure authority or government to act. For example, Canadian medical doctor and politician David Swann has launched a seven-day fast in December 2007 to bring attention to the world's inaction on the humanitarian crisis in Darfur.
In Northern Ireland in 1981 a prisoner, Bobby Sands, was part of the 1981 Irish hunger strike, protesting for better rights in prison. Sands had just been elected to the British Parliament and died after 66 days of not eating. His funeral was attended by 100,000 people and the strike ended soon afterwards.
A hunger strike is a method of non-violent resistance in which participants fast as an act of political protest, or to provoke feelings of guilt or to achieve a goal such as a policy change.

Physiological effects of fasting

See Famine response for the body's energy requirements and the changes in energy metabolism induced by fasting.
Glucose is the body's primary fuel source, and is essential for the brain's functioning. When denied glucose for more than 4-8 hours, the body will turn to the liver for glycogen, a storage form of glucose, to be used for fuel. A process called glycogenolysis converts glycogen into a usable form of fuel. At this point, the body will also use small amounts of protein to supplement this fuel. This fuel will last for up to 12 hours before the body needs to turn to muscle stores of glycogen, lasting for a few more hours. If glucose is still denied at this point, muscle wasting is prevented by temporarily switching to fat as the fuel source. Using a process called Gluconeogenesis, fat is converted into ketone through catabolism. Ketones, while not sugars, are able to be used by the brain as a fuel source as long as glucose is denied.
As a protective biomechanism, many toxins are stored within fat. During catabolism, these toxins are liberated and then released into the blood stream.
The body will continue to use fat for as long as there is fat to consume. The body will generally indicate to the faster when fat levels are running extremely low (less than 2%) with an increased urge for food. Fasts are usually broken long before this point.
If the fast is not broken, starvation will begin to occur, as the body begins to use protein for fuel. It will begin with the least important proteins, then muscles, and eventually organs. Death may occur before the body turns to organs as a fuel source however.

Potential Health Benefits

Research conducted by University of California, Berkeley suggests there are major health benefits to fasting. Benefits include a reduced risk of cancer, the slowing of the aging process and the potential to increase maximum life span Currently, the reduction of caloric intake is the only proven method of increasing the lifespan of an organism According to Dr. Mark P. Mattson, chief of the laboratory of neurosciences at the National Institute on Aging, fasting every other day (intermittent fasting) shows as strong if not stronger beneficial effects as caloric-restriction diets According to The National Academy of Sciences other health benefits include stress resistance, increased insulin sensitivity, reduced morbidity, and again increased life span Long term studies in humans have not been conducted. However, short term human trials showed benefits in weight loss. The side effect was the participants felt cranky during the three week trial. According to the study conducted by Dr. Dr. Eric Ravussin "Alternate-day fasting may be an alternative to prolonged diet restriction for increasing the life span"

Fasting in literature


  • The Bridegroom Fast - This fast was initiated by the leaders of the International House of Prayer, and is observed on the first Monday, Tuesday, and Wednesday of each month. Based on Matthew 9:15, its focus is intimacy with Christ, who is described in the Bible as the bridegroom of the Church. The fast is accompanied by services in Kansas City, which are freely accessible by webcast. It is observed largely in charismatic circles.
  • Jeûne genevois (lit. "fast of Geneva") is a public holiday and day of fasting in the canton of Geneva, Switzerland, occurring on the Thursday following the first Sunday of September.

Pros and cons


  • Adherence to Greek Orthodox fasting periods contributes to a reduction in the blood lipid profile including a non-significant reduction in HDL cholesterol and possible impact on obesity .


  • Increases the likelihood of acetaminophen poisoning, possibly because of depletion of hepatic glutathione reserves..


fasts in Arabic: صوم
fasts in Belarusian: Пост
fasts in Belarusian (Tarashkevitsa): Пост
fasts in Bosnian: Post
fasts in Danish: Faste
fasts in German: Fasten
fasts in Estonian: Paast
fasts in Modern Greek (1453-): Νηστεία
fasts in Spanish: Ayuno
fasts in Esperanto: Fasto
fasts in Persian: روزه
fasts in French: Jeûne
fasts in Croatian: Post
fasts in Indonesian: Puasa
fasts in Italian: Digiuno
fasts in Hebrew: צום
fasts in Georgian: მარხვა
fasts in Kurdish: Rojî
fasts in Macedonian: Пост
fasts in Malayalam: ഉപവാസം
fasts in Malay (macrolanguage): Puasa
fasts in Dutch: Vasten
fasts in Japanese: 断食
fasts in Norwegian: Faste
fasts in Norwegian Nynorsk: Faste
fasts in Polish: Post
fasts in Portuguese: Jejum
fasts in Russian: Пост
fasts in Albanian: Agjërimi
fasts in Sicilian: Dijunu
fasts in Simple English: Fasting
fasts in Slovak: Pôst
fasts in Serbian: Пост
fasts in Finnish: Paasto
fasts in Swedish: Fasta
fasts in Tamil: நோன்பு
fasts in Ukrainian: Піст
fasts in Chinese: 禁食
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