Reducing protein to increase longevity is a bad idea, nutrition experts say

Key Points:

• A recent review suggesting dietary protein restriction promotes longevity is criticized by nutrition experts who warn that low protein intake can harm older adults, leading to frailty, falls, and higher mortality.
• Much of the evidence supporting protein restriction comes from animal studies, which experts say cannot be directly applied to humans, especially older adults who generally require more protein to maintain muscle and function.
• Current dietary guidelines recommend higher protein intake for older adults (1-1.6 grams per kilogram of body weight) to support muscle maintenance and healthy aging, contrasting with the protein restriction advice.
• Experts emphasize that healthy aging focuses on maintaining strength and independence rather than just lifespan, warning that reduced protein may accelerate muscle loss and impair quality of life.
• The type of protein consumed is also important, with a balanced diet rich in minimally processed plant and animal proteins preferred over blanket protein restriction or reliance on protein supplements.