Life Extension Super K, 90 Softgels supplement bottle
Life Extension

Super K, 90 Softgels

What We Researched
4 active ingredients analyzed · 8 inactive ingredients decoded · 3 brand certifications checked · 1 retailer compared · Last updated: Mar 2026
85
Product Score Good
86
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin C (as Ascorbyl palmitate) 10 mg 11%
Vitamin K (as phytonadione) 2,000 mcg 1,667%
Vitamin K2 (as menaquinone-4) 1000 mcg **
Vitamin K2 (as MenaQ7® trans menaquinone-7) 100 mcg **
Bioavailability Very Good

Absorption Rating

  • Vitamin C (as Ascorbyl palmitate) Fair
  • Vitamin K (as phytonadione) Fair
  • Vitamin K2 (as menaquinone-4) Good
  • Vitamin K2 (as MenaQ7® trans menaquinone-7) Good
Other Ingredients Excellent

Fillers & Additives

  • Extra Virgin Olive Oil
  • Gelatin
  • Glycerin
  • Beeswax
  • Purified Water
  • Carob Color
  • Maltodextrin
  • Microcrystalline Cellulose
Efficacy Good

Dosage Analysis

  • Vitamin C (as Ascorbyl palmitate) 10 mg Under-dosed
  • Vitamin K (as phytonadione) 2,000 mcg High
  • Vitamin K2 (as menaquinone-4) 1000 mcg Effective
  • Vitamin K2 (as MenaQ7® trans menaquinone-7) 100 mcg Effective

Supplement Facts

Ingredient Amount % Daily Value
Vitamin C (as Ascorbyl palmitate) 10 mg 11%
Vitamin K (as phytonadione) 2,000 mcg 1,667%
Vitamin K2 (as menaquinone-4) 1000 mcg **
Vitamin K2 (as MenaQ7® trans menaquinone-7) 100 mcg **

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Extra Virgin Olive Oil Safe

It is used as a carrier oil.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Glycerin Safe

Retains moisture and helps dissolve ingredients in softgels and liquids.

Beeswax Safe

Used as a coating and to help form softgel capsules.

Purified Water Safe

Dissolves and carries water-soluble ingredients.

Carob Color Generally_safe

It is used as a natural brown colorant.

Maltodextrin Generally_safe

Helps carry and stabilize active ingredients. Provides bulk.

Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$24$24$22$22$20 Mar 12 $22.50
iHerb

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Life Extension

Founded 1980 · Fort Lauderdale, Florida, USA · 352 products · lifeextension.com

Certifications

3 certifications
Consumerlab Verified Source
Fda Gmp Inspections Verified Source
Nsf Gmp Verified Source

Transparency

4 claims
Third Party Testing Claim — Verified Source
Coa Availability — Verified Source
Testing Lab Disclosure — Claimed

Violation History

2 incidents
Prop 65 Lead2018-04-13Source
Fda Warning Making drug claims for dietary supplements, suggesting they can treat, mitigate, or prevent diseases such as breast cancer and Alzheimer's.2017-02-01Source
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Frequently Asked Questions
Is Life Extension Super K, 90 Softgels a good supplement?

Life Extension Super K, 90 Softgels received a product quality score of 85/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 4 active ingredients Of the 8 inactive ingredients, 6 are rated safe and 0 are flagged for review. The manufacturer, Life Extension, holds a brand trust score of 86/100 with 3 verified certifications including Consumerlab, Fda Gmp Inspections, Nsf Gmp.

What are the ingredients in Life Extension Super K, 90 Softgels?

Life Extension Super K, 90 Softgels contains 4 active ingredients: Vitamin C (as Ascorbyl palmitate) (10 mg), Vitamin K (as phytonadione) (2,000 mcg), Vitamin K2 (as menaquinone-4) (1000 mcg), Vitamin K2 (as MenaQ7® trans menaquinone-7) (100 mcg). Notable high-dose ingredients include Vitamin K at 1,667% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Life Extension Super K, 90 Softgels safe to take?

Life Extension Super K, 90 Softgels has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Life Extension a trustworthy supplement brand?

Life Extension receives a brand trust score of 86/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1980 and headquartered in Fort Lauderdale, Florida, USA, the company offers 352 products in their lineup. They hold 3 verified certifications including Consumerlab, Fda Gmp Inspections, Nsf Gmp. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Life Extension has 2 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.