Turns out the connection my brain suggested isn't all that solid .. I overlooked that his proposed diet is mostly plant-based :D

But I guess your post about fasting made me think about ketosis, which is apparently one aspect of his approach. It's supposed to induce ketosis even though daily calorie intake is still at not so low 750 kcal.

https://en.wikipedia.org/wiki/Valter_Longo

> His research is focused on the fasting-mimicking diet (FMD). The FMD is a low-calorie, low-protein, moderate-carbohydrate, moderate-fat plant-based diet program, that he argues mimics the effects of periodic fasting or water fasting. The course lasts five days, while still aiming to provide the body with nutrition,[11][12] and is considered a periodic fast.