Key points from article :
Calorie restriction slows ageing in almost all species and lineages tested.
Produces lots of changes in almost all aspects of metabolism, so difficult to analyse individually.
Regulates age-related diseases as well as ageing itself.
Protective against cancer, neurodegenerative, cardiovascular, and other metabolic diseases.
The best guess is that induction of autophagy due to calorie restriction causes its beneficial effects.
A collaborative research published in the journal Nutrients.