Boron
Boron glycinate
A trace mineral with an outsized effect on testosterone availability. Boron glycinate at 10mg reduces SHBG - the protein that binds testosterone and makes it unavailable to the body - increasing free testosterone without changing total levels.
What it is
A naturally occurring trace mineral found in soil, water, and certain foods. Boron glycinate is the chelated form, bound to the amino acid glycine for improved absorption and tolerability. Most men get less than 3mg daily from diet alone.
Why it's in Foundation
Total testosterone is only part of the picture. Free testosterone - the fraction not bound to SHBG - is what the body can actually use. Boron directly reduces SHBG, which increases free testosterone without affecting total levels. It also supports D3 metabolism and reduces inflammatory markers associated with hormonal dysfunction.
What the Research Shows
A clinical study showed that 10mg of boron daily for one week significantly reduced SHBG and increased free testosterone in healthy men. The same study showed reductions in inflammatory markers including estradiol, which competes with testosterone at receptor sites.
View the Human Study
SHBG reduction and free testosterone increase at 10mg, published clinical study
How it Works with Other Ingredients
Vitamin D3
Boron enhances Vitamin D3 bioavailability and metabolism, making Foundation's 5,000 IU dose more effective than it would be without boron.
Tongkat Ali
Tongkat Ali frees bound testosterone through cortisol reduction while Boron frees it by reducing SHBG - two complementary mechanisms.
Zinc
Zinc supports testosterone production while Boron ensures more of that testosterone remains free and bioavailable.