Solgar Vitamin K2 (MK-7) 100mcg
by Solgar
"Natural MK-7 from natto — 100mcg vitamin K2 for calcium direction into bones and away from arteries"
Overview
Solgar Vitamin K2 (MK-7) provides 100mcg of the MK-7 form of vitamin K2 derived from natto (fermented soybeans). Vitamin K2 activates two critical proteins: osteocalcin (which directs calcium into bones) and matrix GLA protein (which prevents calcium from depositing in arteries). MK-7 is the preferred form because it has a longer half-life (72 hours vs 1-2 hours for MK-4), providing sustained activation of these calcium-directing proteins. This is especially important for anyone taking vitamin D3, which increases calcium absorption but doesn't direct where it goes.
Key Ingredients
| Ingredient | Amount |
|---|---|
| Vitamin K2 (as MK-7 from Natto) | 100 mcg |
Pros & Cons
What We Like
- MK-7 form (72-hour half-life)
- Natural source (natto-derived)
- Directs calcium to bones
- Prevents arterial calcification
- 8,000+ Amazon reviews
What Could Be Better
- Only 50 capsules
- Interacts with warfarin/blood thinners
- Soy-derived (natto)
- Premium price for single nutrient
Who Is This For?
Best For
- Those taking vitamin D3 (essential companion)
- Bone health optimization
- Cardiovascular calcium management
- Those wanting standalone K2
Not Ideal For
- Those on warfarin/blood thinners
- Soy-allergic individuals
- Those wanting D3+K2 combo
Our Verdict
Solgar Vitamin K2 MK-7 is the standalone K2 for those who already take vitamin D3 separately. The natto-derived MK-7 provides 72-hour calcium-directing activity. If you take vitamin D without K2, you're missing half the equation.