Diets rich in polyamines like spermidine may extend lifespan. Data is presented from a study with male mice, showing that high polyamine intake increased median lifespan compared to normal polyamine intake. Spermidine levels in humans has been found to decline with age, and lower levels have been observed in individuals with...

Researchers tested the hypothesis that testicular hormones released after puberty are responsible for sex-specific differences in lifespan....