Tied to healthy testosterone, mood, bone strength and immunity.
Vitamin D3 is a fat-soluble vitamin that behaves more like a hormone, influencing systems beyond bone health.
Reinforces the formula's testosterone-metabolism layer alongside Zinc.
Observational research links adequate D3 status to healthy testosterone, mood and bone density.
This describes general research on Vitamin D3 itself, not the finished AlphaTrust product, which hasn't been the subject of its own clinical trial. See the full list or the formula overview.