Fasting is the practice of abstaining from some or all food, drink, or both, for a period of time. The word "fasting" comes from the Old English word "fæsten," which means to abstain from food. In Hebrew, fasting is known as tzom (צום). Other relevant translations include ayuno in Spanish, jeûne in French, and fasten in German. Fasting can be done for various reasons, including religious, health, or political purposes. In many religions, such as Islam, Christianity, Judaism, and Buddhism, fasting is a significant practice. For example, during the Islamic month of Ramadan, Muslims fast from dawn to sunset. Similarly, in Judaism, fasting is observed on certain holidays like Yom Kippur, known as the Day of Atonement. Health-wise, fasting has been studied for its potential benefits, such as improved metabolic health and longevity. However, it is essential to approach fasting with caution, as it can have adverse effects if not done correctly, especially for individuals with certain medical conditions.
Willing abstinence from, or reduced consumption of, food and/or drink
Fasting is the act of refraining from eating, and sometimes drinking. However, from a purely physiological context, "fasting" may refer to the metabolic status of a person who has not eaten overnight, or to the metabolic state achieved after complete digestion and absorption of a meal. Metabolic changes in the fasting state begin after absorption of a meal.