Unfortunately, protein is never completely spared and some muscle tissue is lost, even during short fasts. Weakness, nausea, and depression can also develop during a fast, as a result of ammonia and nitrogen released into the blood during the breakdown of muscle. In extreme cases, extended fasts can lead to disturbances of heart rhythm and death. Fasting should never be used as a weight loss aid. The few pounds that are lost in the beginning of a fast are from water, and this weight will return as soon as the fast is over.
Some people fast as part of a detoxification program.
However, the value of fasting for this purpose is not yet backed by much scientific research. Even so, a modified fast should be limited to no more than a few days. This Encyclopedia was researched and written by a team of nationally known health care professionals from a variety of disciplines, who labored to create a new standard of excellence with this innovative and comprehensive reference work. To learn more about the authors and contributors click here .