Rhonda Patrick· PhD
Spermidine, a compound high in natto, prevented liver cancer and extended lifespan by 25% in mice.
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The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
Spermidine, a compound high in natto, prevented liver cancer and extended lifespan by 25% in mice.
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I know it's found in high concentrations in natto, the Japanese fermented soybean that doesn't taste like great. But I've seen studies about aging, you know, giving it to even aging mice or something, can then extend their lifespan. Is that true?