A new study has revealed that intermittent fasting may help you live longer and improve your overall health. While many fad diets, such as keto, have been proven unsustainable or even, in some cases, harmful, intermittent fasting has by and large held up to scientific testing. Intermittent fasting diets, fall generally into two categories: daily time-restricted feeding, which narrows eating times to 6-8 hours per day, and the so-called 5:2 ...