Spermidine

Spermidine is a polyamine found in cells and sold as a supplement (often from wheat germ) with claims that it slows skin aging, smooths wrinkles, and restores firmness. No convincing benefit for age-related skin changes has been shown – there is no evidence base for this use, only lab data and theory. Taken orally at usual doses spermidine is harmless, but you should not expect it to affect wrinkles or elasticity. What actually changes aging skin is daily sun protection (SPF) and topical retinoids, which have proven effects.

Spermidine is a polyamine found in foods such as wheat germ, soy, mushrooms and aged cheese, and as a supplement it gets promoted for slowing aging and extending lifespan. The interest comes from cell and animal studies where spermidine triggered autophagy, but convincing benefit for this use has not been shown in people: there are no high-quality long-term trials with hard outcomes. Healthy aging rests on well-established habits – a balanced diet, regular physical activity, enough sleep, not smoking and keeping cardiovascular risk factors in check.

Spermidine is a natural polyamine sold as a supplement for memory and focus, citing its role in autophagy and animal studies. In people, no convincing benefit for memory or attention has been shown, and the evidence for this use is lacking. Cognition is better supported by sleep, physical activity, and controlling blood pressure and glucose, with a medical check-up if memory problems persist.