Is fasting good for health?
Results from studies on the health effects of Ramadan fasting are mixed, probably because the length of the fast and the weather conditions experienced vary depending on the time of year and the country where the fast is being observed. Some studies have found that people lose weight during Ramadan (although they tended to put this weight back on after Ramadan). If you are overweight and would like to lose weight and keep it off, then making plans to maintain a healthy diet and get active when Ramadan is finished may help you sustain any weight lost due to fasting.
Some small studies have looked at the effect of Ramadan fasting on factors like blood cholesterol and triglycerides (fat in the blood) and found a short term improvement in some cases although some studies found no effect. There have also been some small studies that suggest that Ramadan fasting may have a short term beneficial effect on the immune system. In both cases, the results of studies have been mixed and so more research is needed to confirm these results.