Zinc
Zinc citrate
Testosterone cannot be produced without zinc. Foundation uses zinc citrate - the most bioavailable form - at 30mg, the dose shown in clinical research to support testosterone production in men.
What it is
An essential trace mineral involved in over 300 enzymatic reactions in the body. Zinc citrate is bound to citric acid for superior absorption compared to cheaper forms like zinc oxide. The body cannot store zinc, making consistent daily intake critical.
Why it's in Foundation
Zinc deficiency is one of the most common and most reversible causes of low testosterone in men. Even mild deficiency measurably suppresses T production. At 30mg, Foundation delivers a therapeutic dose - not a token amount added for label appearance.
What the Research Shows
Multiple studies show zinc supplementation significantly increases testosterone in deficient men. Research also shows that zinc restriction in men with normal levels causes measurable testosterone decline within weeks, confirming its direct role in T production.
View the Human Study
Testosterone production and zinc deficiency in men, published clinical trial
What to Expect
How it Works with Other Ingredients
Copper
High-dose zinc depletes copper over time. Foundation includes copper specifically to maintain the zinc-copper mineral ratio your body requires.
Vitamin D3
Both support testosterone through separate pathways. Zinc provides the raw material for synthesis while D3 supports the hormonal signaling that drives it.
Tongkat Ali
Tongkat Ali amplifies testosterone output while zinc ensures the body has the raw material needed to produce it.