Life Extension Super K
by Life Extension
"Complete vitamin K complex — K1, MK-4, and MK-7 for bone density, arterial health, and calcium management"
Overview
Life Extension Super K provides a comprehensive vitamin K complex with all three important forms: vitamin K1 (1500mcg phylloquinone for blood clotting), vitamin K2 as MK-4 (1000mcg for bone metabolism), and vitamin K2 as MK-7 (100mcg for long-acting arterial protection). Each form serves different functions — K1 primarily supports coagulation, MK-4 activates osteocalcin for bone mineralization, and MK-7 has a 72-hour half-life providing sustained activation of matrix GLA protein that prevents arterial calcification. This triple-K approach ensures comprehensive vitamin K benefits.
Key Ingredients
| Ingredient | Amount |
|---|---|
| Vitamin K1 (Phylloquinone) | 1500 mcg |
| Vitamin K2 (MK-4) | 1000 mcg |
| Vitamin K2 (MK-7) | 100 mcg |
Pros & Cons
What We Like
- All three vitamin K forms (K1, MK-4, MK-7)
- Comprehensive bone and arterial support
- 90 softgels (3-month supply)
- Life Extension research-backed formulation
- 10,000+ Amazon reviews
What Could Be Better
- Contraindicated with warfarin/blood thinners
- Premium price for vitamin K
- High K1 dose may not be necessary for all
- Not suitable for those on anticoagulants
Who Is This For?
Best For
- Bone density support
- Arterial calcification prevention
- Those supplementing vitamin D (need K2)
- Comprehensive vitamin K coverage
Not Ideal For
- Those on warfarin/anticoagulants
- Those only wanting MK-7
- Budget vitamin K seekers
Our Verdict
Life Extension Super K is the most comprehensive vitamin K supplement — all three forms for bone density, arterial health, and coagulation. Essential pairing with vitamin D supplementation. Absolutely contraindicated with warfarin.
Alternatives to Consider
No direct alternatives listed for this product yet.