Fasting Emphasized and Modified*
[2:183] O you who believe, fasting is decreed for you, as it was decreed for those before you, that you may attain salvation.
*2:183-187 Like all duties in Submission, fasting was decreed through Abraham (22:78, Appendices 9 & 15). Prior to revelation of the Quran, sexual intercourse was prohibited throughout the fasting period. This rule is modified in 2:187 to allow intercourse during the nights of Ramadan.
[2:184] Specific days (are designated for fasting); if one is ill or traveling, an equal number of other days may be substituted. Those who can fast, but with great difficulty, may substitute feeding one poor person for each day of breaking the fast. If one volunteers (more righteous works), it is better. But fasting is the best for you, if you only knew.
[2:185] Ramadan is the month during which the Quran was revealed, providing guidance for the people, clear teachings, and the statute book. Those of you who witness this month shall fast therein. Those who are ill or traveling may substitute the same number of other days. GOD wishes for you convenience, not hardship, that you may fulfill your obligations, and to glorify GOD for guiding you, and to express your appreciation.
Intermittent fasting is scientifically considered one of the best ways to improve one’s physical health and reduce the affects of aging.
Intermittent Fasting – BBC
Benefits of Fasting