Vitamin K2
Menaquinone-7
A fat-soluble vitamin that directs calcium into bone and away from soft tissue, studied for its role in cardiovascular protection, bone density, and making high-dose Vitamin D3 supplementation both effective and safe.
MK-7, 120 mcg per servingThe vitamin that tells calcium where to go.
Vitamin K2 as MK-7 is the most bioavailable and longest-acting form of K2 available. Unlike K1, which is involved in blood clotting, K2 activates the proteins that govern where calcium goes in the body. The two most important are osteocalcin, which binds calcium into bone, and matrix Gla protein, which keeps calcium from depositing in arterial walls and soft tissue. MK-7 has the longest half-life of any K2 form, so a single daily dose keeps those proteins activated around the clock.
Foundation uses 120 mcg per serving because that's the dose shown to fully activate matrix Gla protein in clinical studies, not a token amount added to round out a label.
K2 is the mechanism that makes high-dose D3 both effective and safe long-term.
Foundation includes 5,000 IU of Vitamin D3 per serving. At that dose, D3 significantly increases calcium absorption from food and supplementation, which is exactly what you want for bone density and hormonal function. But calcium that enters the body has to be directed correctly. Without adequate K2, high-dose D3 supplementation can drive calcium into arteries and soft tissue rather than bone. K2 MK-7 is the mechanism that makes high-dose D3 both effective and safe over the long term. It isn't in Foundation as a bonus ingredient. It's in Foundation because leaving it out would be irresponsible.
Your 90-day timeline.
K2 begins optimizing calcium metabolism immediately. While effects on testosterone-related markers take longer to measure, the protective role alongside D3 is active from day one.
The synergistic effect with D3 becomes measurable. K2 works in the background, ensuring the calcium D3 helps absorb is being directed into bone rather than soft tissue.
Long-term K2 supplementation shows its strongest effects on bone and cardiovascular markers. Consistent use alongside D3 is where the combined benefit compounds.
120 mcg MK-7. Enough to fully activate matrix Gla protein.
Research shows that 90 to 120 mcg of MK-7 daily is sufficient to fully activate matrix Gla protein, the primary protein responsible for preventing arterial calcification. MK-7 supplementation has also been shown to improve bone mineral density and reduce arterial stiffness over time. Foundation uses 120 mcg, the top of that clinically studied range, in the MK-7 form specifically because of its superior half-life and bioavailability compared to MK-4.
One signal in a four-part system.
Vitamin D3
D3 drives calcium absorption. K2 directs where that calcium goes. Neither works optimally without the other at meaningful doses. This is the most clinically established nutritional pairing in Foundation, and the reason both are included at therapeutic levels rather than token amounts.
Zinc
Zinc supports testosterone synthesis at the testicular level. K2 protects the cardiovascular system that delivers those hormones. One works on the output, the other protects the system that carries it.
Boron
Boron reduces SHBG, freeing bound testosterone for use, and supports bone metabolism through pathways that overlap with K2. Both work on the structural systems Vitamin D3 influences, making the three a complementary cluster within the formula.
Foundation puts all four to work.
The same clinically studied doses, in one daily formula. No fluff, no fillers, no proprietary hand-waving.
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