Unsourced material may be challenged and removed. fasting for the cure of disease pdf hours, or a number of days.
Other fasts may be partially restrictive, limiting only particular foods or substances. Fasting practices may preclude intercourse and other activities as well as food. 12 hours from their last meal. Many people may also fast as part of a medical procedure or check-up such as a colonoscopy.
Fasting is also a part of many religious rituals. Fasting is of no help in either preventing or treating cancer. There is weak evidence that a short-term period of fasting may have benefits during treatment. However the psychological effects may also include anxiety and depression. It has been argued that fasting makes one better appreciate food.