Dr Axel Sigurdsson published an epic post on intermittent fasting early in 2020. I don’t doubt anything in it although I haven’t yet taken a deep dive into the subject like he has. I touched 0n it here, here, here, and here. I’ve done some 24-hour fasting myself (here and here).
From the good doctor:
Animal studies suggest that intermittent fasting may have several health benefits. Some of these benefits, in particular, the effects on obesity, type 2 diabetes, and cardiovascular risk factors, have been confirmed in studies on humans.
However, the popularity of intermittent fasting within the general public is in stark contrast with the gaps in evidence on the clinical benefits of this approach.
Source: Intermittent Fasting and Health – The Scientific Evidence
Steve Parker, M.D.