Boron
What the evidence shows
A trace mineral with small but consistent trial evidence for lowering SHBG — the protein that binds testosterone and renders it biologically inactive — which raises free testosterone even when total testosterone barely moves. One of the more mechanistically clean supplement stories in this space.
How it's thought to work
Reduces sex hormone-binding globulin (SHBG) production, increasing the fraction of testosterone that's free/bioavailable rather than protein-bound.
Typical Dosage
6–10mg/day as boron citrate or glycinate.
Safety Notes
Safe at studied doses. Avoid doses well above 20mg/day long-term without guidance.
Want the full clinical breakdown?
Does boron increase testosterone? It reduces SHBG, raises free testosterone by roughly 25%, and lowers estradiol in a single week at 10mg/day — one of the most underrated minerals in men's testosterone support.
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