Life Extension
Super K
88/100
SUPPIE SCORE
92/100
EFFICACY
High
SAFETY
84/100
CLEANLINESS
What Does Super K Do?
Super K offers excellent efficacy with research-backed dosages of K1 and K2 for bone and heart health; formulation optimizes absorption. Overall safe for healthy adults, but caution advised with anticoagulants due to clotting effects.
What are the benefits of combining K1 and K2 forms in this supplement?
How does Super K support bone and cardiovascular health?
Is this dosage of vitamin K safe for daily use with blood thinners?
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What Are the Benefits of Super K?
Based on proven scientific research
Bone health supportVery strong
Cardiovascular protectionVery strong
Calcium metabolism regulationStrong
Arterial flexibilityStrong
Good For:
What Are the Side Effects of Life Extension Super K?
Always consult your health practitioner if in doubt.
RiskLow Risk
Overview
•Vitamin K dosages (3.18 mg total) are within safe limits for healthy adults but may interfere with anticoagulant medications like warfarin; consult healthcare provider if on blood thinners.
•Low risk of side effects; rare mild gastrointestinal upset from high doses, but this formulation uses bioavailable forms with olive oil for better absorption.
•Not recommended for pregnancy or breastfeeding without medical advice due to potential effects on blood clotting; safe for most adults otherwise.
•Gelatin capsule poses allergy risk for those with bovine sensitivities; no major contaminants reported from Life Extension's manufacturing.
•Long-term use supports bone and heart health but monitor vitamin K intake if consuming high amounts of leafy greens.
•No significant drug interactions beyond anticoagulants; low interaction potential with common medications.
Potential Side Effects
Negative Interactions
Allergens
Gelatin (bovine source)Beeswax (potential bee product allergy)
Inactive Ingredients
Extra virgin olive oil
GoodGelatin
Low RiskGlycerin
Low RiskBeeswax
Low RiskPurified water
Low RiskCarob color
Low RiskMaltodextrin
Low RiskMicrocrystalline cellulose
Low RiskWhat Are the Ingredients in Life Extension Super K?
Vitamin C (as ascorbyl palmitate)
10 mg
Vitamin K (as phytonadione)
2000 mcg
Vitamin K2 (as menaquinone-4)
1000 mcg
Vitamin K2 (as MenaQ7 trans menaquinone-7)
180 mcg
extra virgin olive oil
gelatin
glycerin
beeswax
purified water
carob color
maltodextrin
microcrystalline cellulose
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Dosage & Bioavailability
How the active doses and forms in Super K compare to the research.
•Vitamin C (as ascorbyl palmitate) — 10 mg per serving, a small part of the daily reference intake (80 mg EU NRV, 90 mg US DV); studies use 200-3,000 mg/day.
•Vitamin K (as phytonadione) — 2,000 mcg per serving; studies use 90-1,000 mcg/day. Above studied amounts is not the same as unsafe.
•Vitamin K2 (as menaquinone-4) — 1,000 mcg per serving; within the 90-1,000 mcg/day used in studies.
Sources & References
Frequently Asked Questions
Common questions about Life Extension Super K