Please read the below carefully.
FASTING AND HEALTH CARE
The benefits of fasting transcend guiding the faster from idle talk and indecent acts. It is a sentinel against disease, providing the faster follows the strict dietary rule: eat during fast-breaking and avoiding over-eating. Allah (SWT) states: "...Eat and drink, but waste not by excess, for ALLAH SWT loves not wasters." (Al-Quran, 7:31)
A great deal of ailments originate from stomach indigestion. This is why the Messenger of ALLAH SWT says: "The son of Adam will never fill a container with something worse and evil than his stomach. It will suffice him some morsels (food) that will keep him on his feet, otherwise, he should divide his stomach into three parts: one third for his food, the other for his drink and the other third for his breath." (Ibn Hibban)
This hadith indicates that the stomach is an essential organ of human body. Even in the age of sophisticated machines, you can hardly find a machine so fragile but yet so remarkably durable and efficient like the stomach. This is the machine that receives food particles, processes and refines them. This is a lifelong operation. For the non-faster, the stomach will have no chance for rest. When the stomach is empty, as a result of fasting, it gets well-desired rest, to renew and rejuvenate its energy. With the fasting, the stomach is forced to go through a discharge whereby harmful residue are eliminated.
During fast, the system of secretion is organized, and this in turn benefits the blood pressure, inhibiting hardening of the arteries. The heart and kidney functions are enhanced as the work load tapers off.
The fast helps to correct the problem of obesity and diabetes. Doctors over the years have used fasting as a prescription for certain ailments.