The Case Against More Protein: Why Cutting Certain Amino Acids May Extend Healthspan
Graded Moderate — narrative review of animal and human studies on protein and amino acid restriction, with much of the mechanistic evidence drawn from model organisms rather than people.
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- One author advises and receives funding from Aeovian Pharmaceuticals, which…
This review suggests the type of protein you eat may matter as much as the amount.
Older adults are usually told to eat more protein. This review of the science argues the opposite may help metabolic health and lifespan, at least in animals. Cutting back on three specific amino acids (methionine, isoleucine, and valine) seems to deliver much of the benefit on its own. The catch: most of this evidence comes from animals, not people, and older adults still need protein to protect muscle.
Conflict of Interest Disclosure: One author advises and receives funding from Aeovian Pharmaceuticals, which develops mTOR inhibitors.
Disclaimer: Research summaries are provided for informational purposes only and do not constitute medical advice. Always consult a qualified healthcare professional before making changes to your health routine.