The Longevity Diet is a 2018 book by Italian biogerontologist Valter Longo.

Valter Longo, a PhD in biochemistry and director of the Longevity Institute at the University of Southern California, invented the fasting mimicking diet.

[3] In the book, Longo says one should alter one's diet to avoid illness in old age.

[5] The book calls for the five-day, calorie restriction FMD to occur twice per year.

[10] Writing for Red Pen Reviews, Hilary Bethancourt stated the diet might be difficult and expensive to follow.