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L-carnitine supplementation

The effect of L-carnitine on semen parameters

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Jan 11, 2026
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What doses and durations of zinc, L-carnitine, and maca improve semen volume in older men?

Randomized and observational studies suggest L‑carnitine, zinc and maca can improve some semen parameters, and several trials report increased seminal volume after supplementation—however doses and du...

Jan 28, 2026
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What lifestyle factors can influence semen volume decline after age 40?

, especially after the late 40s, but lifestyle choices interact with—and in some cases amplify—that decline; smoking, heavy alcohol use, obesity, poor diet, lack of exercise, sleep disruption, and env...