Usc Study Links Modified Mediterranean Diet to Longer Lifespan

A recent study from USC has revealed that a modified Mediterranean diet, low in protein but supplemented with methionine, can enhance healthy lifespan and reduce frailty in mice. These findings align with data from over 200,000 humans suggesting similar health benefits from a more plant-based diet.

Study Overview and Diet Composition

The research, led by Valter Longo at the USC Leonard Davis School of Gerontology, examined the effects of a plant- and fish-based diet supplemented with a small amount of the amino acid methionine. Longo’s work builds on the dietary patterns observed in southern Europe, where populations enjoy long life expectancies yet show high rates of frailty. In the study, groups of 20-month-old mice were assigned to one of four diets: a standard control diet, a Western diet high in fats and sugars, a low-carbohydrate ketogenic diet, or the longevity diet, which was low in protein and supplemented with methionine.

Impact of the Longevity Diet on Health Outcomes

Mice consuming the longevity diet exhibited significantly improved health outcomes compared to those on the other diets. Notable benefits included a longer healthspan, decreased fat mass, and reduced frailty levels. Lead author Maura Fanti remarked on the surprising effectiveness of altering just methionine levels, suggesting that specific amino acid compositions might have a more pronounced effect than overall protein intake.

Human Data and Next Steps for Research

The research team also analyzed data from over 200,000 individuals, which revealed that higher animal protein intake correlated with increased obesity rates and a doubled risk of Type 2 diabetes. These observations remained consistent despite participants with higher animal protein consumption reportedly having lower caloric intakes. The authors stress that while their findings challenge established beliefs about the link between calorie reduction and weight loss, careful consideration of methionine levels is crucial. Plans for future research include a controlled clinical trial of the longevity diet in humans to better understand its potential benefits.

THE CNP TAKEAWAY

Considering dietary patterns that prioritize plant-based foods and moderation in protein, particularly methionine, may lead to healthier aging. These findings underscore the importance of specific nutrients in our diets.

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