[cheeko1234]

Caloric restriction is an experimental tool that utilizes “undernutrition without malnutrition.”

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4115619/

A simple interpretation of CR would be: “additional leanness from a normal body weight may add health and life span delaying the process of aging.”

Regarding BMI, rule of thumb is 20-ish.

CR in the NIA study reduces body weight by 25%, so the NIA CR “man equivalent” will have a BMI of 20.8 (in the lower half of the normal weight category)

[sliverstorm]

Ok, so really it's just about targeting a leaner body composition, that makes a lot more sense. Thank you.