What the trials say about the products people actually buy — including the ones that came back empty.
A systematic review examined the herbs sold as testosterone boosters. Two had reasonable supporting trials, several had almost nothing, and the reasons matter.
16 September 2026 · 4 min read
One small 2011 trial made vitamin D look like a hormone fix. A better-designed trial and a pooled analysis of eight studies reached a different conclusion.
16 September 2026 · 3 min read
An industry-funded study said a zinc-magnesium blend raised free testosterone. A larger independent one, run eight weeks later, found nothing at all.
16 September 2026 · 3 min read