Super K by Life Extension – Two Forms of K2 Plus K1 – 90 Softgels

Life Extension Super K – Complete Vitamin K Complex with K1, MK-4 & MK-7

Vitamin K is far more than a clotting factor — it plays a critical role in directing calcium to bones and away from arteries. Life Extension’s Super K delivers all three clinically relevant forms of vitamin K in one daily softgel: K1 (phylloquinone), MK-4, and MK-7 (both forms of K2). This comprehensive formula supports bone density, cardiovascular health, and arterial flexibility — making it an ideal companion to vitamin D3 supplementation.

What Does Super K Do?

• Activates osteocalcin to direct calcium into bones, supporting density and strength
• Activates Matrix Gla Protein (MGP) to prevent calcium from depositing in arteries
• MK-7 provides long-lasting 24-hour K2 activity for consistent carboxylation
• MK-4 offers rapid, tissue-specific activity in bones and soft tissues
• K1 supports healthy coagulation and liver function
• Gluten-free, non-GMO softgel formula

Who Should Take This?

Super K is ideal for anyone taking vitamin D3 supplementation (D3 increases calcium absorption, and K2 ensures that calcium goes to bones rather than arteries), older adults focused on bone density and cardiovascular health, and individuals seeking comprehensive vitamin K support beyond what a standard multivitamin provides.

Product Highlights

• Key Ingredients: Vitamin K1 (phylloquinone), Vitamin K2 as MK-4, Vitamin K2 as MK-7
• Softgel Count: 90 Softgels (3-month supply)
• Brand: Life Extension
• Dosing: 1 softgel daily
• Formula: Gluten-Free, Non-GMO

Frequently Asked Questions

Why do I need K2 if I’m taking vitamin D3?
Vitamin D3 increases calcium absorption from the gut. Without adequate K2, that extra calcium can deposit in arteries rather than bones. K2 activates proteins that shuttle calcium to bone tissue and inhibit arterial calcification — making D3 + K2 one of the most important supplement pairings for long-term cardiovascular and skeletal health.

What is the difference between MK-4 and MK-7?
MK-4 has a short half-life and acts quickly in specific tissues like bones and the brain. MK-7 has a much longer half-life (up to 72 hours), providing sustained, full-body K2 activity throughout the day. Super K provides both for comprehensive coverage.