High-protein diets have become increasingly popular, but new research suggests they may not be the best choice for everyone—especially those who are less physically active. Scientists found that excess amino acids from protein, when not used for muscle building through exercise, may accelerate cellular damage linked to aging. Animal studies and early human research indicate that moderate protein restriction could improve metabolism, increase the hormone FGF21, and promote healthier aging. However, experts emphasize that there is still no long-term human evidence, and protein needs vary based on age, health, and activity levels. For now, staying physically active may be just as important as increasing protein intake.
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