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Methionine-Boosted Diet Extends Mouse Healthspan, Human Trials Planned

6/24/2026

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Summary

Story summary

Researcher Valter Longo at USC led a team that found a methionine-supplemented diet extended mouse healthspan and reduced frailty.
Mice ate equal calories, lost fat, kept lean mass, and showed growth hormone, GLP-1, and FGF21.
Data from 200,000 people linked high animal protein to more obesity and double diabetes risk.
Longo holds equity in L-Nutra and co-invented patents on the diet.
Researchers will run human trials to assess safety and efficacy.

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Story summary

Researcher Valter Longo at USC led a team that found a methionine-supplemented diet extended mouse healthspan and reduced frailty.
Mice ate equal calories, lost fat, kept lean mass, and showed growth hormone, GLP-1, and FGF21.
Data from 200,000 people linked high animal protein to more obesity and double diabetes risk.
Longo holds equity in L-Nutra and co-invented patents on the diet.
Researchers will run human trials to assess safety and efficacy.