Boron (Glycinate)

Boron is a trace mineral that most men have never heard of, and most supplement formulas ignore entirely. That's a mistake. Within hours of supplementation, boron measurably reduces sex hormone binding globulin, the protein that binds testosterone in the bloodstream and renders it biologically inactive. Less SHBG means more of the testosterone your body produces is actually free to be used. Boron also supports vitamin D metabolism and bone health through overlapping pathways. Foundation uses boron glycinate at 10 mg because glycinate is the most bioavailable chelated form, and 10 mg is the dose used in the human studies that demonstrated meaningful reductions in SHBG within days of starting supplementation.

Producing testosterone is only half the equation. Most of what your body produces gets bound to SHBG before it can do anything. Elevated SHBG is one of the most common reasons men with normal total testosterone still feel and function like they have low testosterone. The free testosterone number is what matters clinically, and boron directly increases it by reducing the protein that's binding it. None of the other ingredients in Foundation address SHBG directly. Boron fills that gap. It makes the testosterone produced by every other mechanism in this formula actually available to the body that produced it.