Fasting is an age-old practice, but intermittent fasting – a diet plan that commutes between defined eating periods and non-eating – has recently become particularly popular after numerous referrals from celebrities and tech moguls.  Fasting enthusiasts claim that it helps with focus, weight loss and energy.
There is some evidence to support this. A small study published in the journal Adipositas revealed that participants who ate between 8:00 and 14:00. had a lower appetite and less body fat.
But like any diet, intermittent fasting can also lead to extreme eating habits. Twitter boss Jack Dorsey, who prescribes a fasting diet, eats a single meal on weekdays, followed by a weekend deficit ̵
In some cases, the negative side effects of fasting outweigh the potential benefits. Here are some indications that an intermittent fasting routine is unsafe or unhealthy.