Eight Hyped Compounds Failed to Extend Lifespan in a Major Mouse Study
The NIA's Interventions Testing Program tested eight compounds across three lab sites in genetically diverse mice. None extended lifespan. That includes astaxanthin, alpha-ketoglutarate, pioglitazone, atorvastatin-telmisartan, and others with prior promising results. Some compounds previously shown to work at different doses or start ages didn't replicate under new conditions. Two drugs actually shortened lifespan in female mice.
Kernaussage
This study suggests that dose and timing matter enormously, and early lifespan results in mice often don't hold up.
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Quail Bred to Reproduce More Aged Faster, Supporting a Core Theory of Aging
Researchers selectively bred Japanese quail for higher or lower reproductive effort across several generations. By generations five and six, the high-reproduction birds died sooner. The lifespan difference came from faster aging rates, not from being more fragile to begin with. This is some of the cleanest experimental evidence in vertebrates that investing more in reproduction comes at a real cost to longevity.
We May Not Be Aging Slower. We're Just Starting Later.
A big question in longevity research is whether rising life expectancy means we're actually aging more slowly. This analysis of mortality data from 12 countries suggests the answer is no. After accounting for historical shocks like wars and pandemics, the rate at which aging accelerates after 80 hasn't changed. The gains in lifespan appear to come from pushing back when serious aging begins, not from slowing the process itself.
Metformin's Anti-Aging Case: Strong Clues but Still No Proof
This review pulls together lab, population, and clinical trial evidence on metformin as a potential aging-slowing drug. At normal doses, metformin seems to flip several key aging switches: boosting cellular cleanup, calming inflammation, and improving energy production. Large population studies link metformin use to lower rates of age-related diseases, even in people without diabetes. However, the review honestly notes that metformin may actually worsen aging in older animals, so the picture is still mixed.
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