If you are keen to experiment with intermittent fasting, do consult your doctor first and apprise about your health condition.

Longer hours of fasting might not be a good idea for someone who is old, or having a health complication. “Longer periods without food, such as 24, 36, 48 and 72-hour fasting periods, are not necessarily better for you and may be dangerous. Going too long without eating might actually encourage your body to start storing more fat in response to starvation,” say experts at John Hopkins.