Life Extension Super K
Life Extension

Life Extension Super K

Vitamin K Supplement, 2000 Mcg Vitamin K and 1180 Mcg Vitamin K2, Heart Health, Once-Daily, 90 Softgels

$22.50$30Save 25%4.6(6,906 reviews)
Mubboo Score B+
Buy on Amazon $22.50

Price as of 2026-06-19. Check Amazon for the current price.

Quick Decision

Mubboo Score
B+
Best For
Risk-averse buyers
Skip If
Sports Research ® Vitamin D3 4000 IU offers a better rating (4.8/5) at a similar or lower price ($18)
Reviews
6,906+ · reliable

Is This Right For You?

✅ Great for
  • Risk-averse buyers — 6,906+ reviews give a highly reliable picture
  • Life Extension loyalists — the brand spans 44 products in our database
⚠️ Think twice if
  • Sports Research ® Vitamin D3 4000 IU offers a better rating (4.8/5) at a similar or lower price ($18)
💡 Consider instead
  • Nature Made Super B Complex — 56% cheaper at $10 (Score A+)
  • Sports Research ® Vitamin D3 4000 IU — higher rated at 4.8/5 ($18)

📊 Based on data analysis of 147 products in this category.

Mubboo Score: B+

Quality9.2/10
based on 4.6/5 customer rating
Popularity6.9/10
6,906 reviews, top 69% in vitamins
Value4.5/10
priced below 45% of vitamins
How we calculate the Mubboo Score

Quality (45%): customer rating, normalized to a 10-point scale

Popularity (35%): review volume vs the category leader, log-scaled

Value (20%): price position vs other vitamins

Computed from live Amazon rating, review count, and price across 147 vitamins · last refreshed 2026-06-19.

How It Compares

This Product
Life Extension Super K
Most Popular
Goli Apple Cider Vinegar Gummies
Best Rated
Sports Research ® Vitamin D3 4000 IU
Best Value
Nature Made Super B Complex
Price$22.50$28.80$17.95$9.89
Rating4.6/54.4/54.8/54.7/5
Reviews6,906368,60471,41142,960
Mubboo ScoreB+A-AA+

What People Say

Synthesized from 40 reviews · 100% verified purchases.

Prioritize supplements with clean ingredient panels and a form you enjoy taking, like gummies or small softgels, to maintain consistency. For nootropic formulas, start with one capsule with food to gauge tolerance, and allow several weeks for full benefits.

Praised for
  • Great Taste / No Unpleasant Flavor
  • Convenient and Easy to Take
  • Noticeable Health Benefits
  • Clean Ingredient Profile
  • Trusted Brand Reliability
Common complaints
  • Side Effects / Adverse Reactions
  • Delayed or Insufficient Results
  • Cost / Supply Concerns

Related Video Reviews

About Life Extension

  • 44 products in our database
  • Average rating: 4.5/5 across all products
  • Price range: $4.39$52.50
  • Categories: Creatine Supplements, glandular-extracts, herbal-supplements, Magnesium Supplements, Melatonin, Multivitamins

Other vitamins

Bottom Line

Life Extension Super K earns Mubboo Score B+. Priced at $23 — a mid-range option, below the category average of $27. Rated 4.6/5 from 6,906+ reviews. Strong buy if: risk-averse buyers, life extension loyalists. Skip if: sports research ® vitamin d3 4000 iu offers a better rating (4.8/5) at a similar or lower price — Goli Apple Cider Vinegar Gummies (Score A-, $29) may fit better.

Buy on Amazon $22.50Last verified: 2026-06-19

Frequently Asked Questions

Is the Life Extension Super K worth buying in 2026?

It earns a Mubboo Score of B+, with a 4.6/5 rating from 6,906 reviews — better than 41% of vitamins we track.

How much does the Life Extension Super K cost?

It is currently $22.50 — mid-tier pricing for vitamins.

How does the Super K compare to other vitamins?

The category's most-reviewed alternative is the Goli Apple Cider Vinegar Gummies (4.4/5, 368,604 reviews, $28.80). The Super K carries a Mubboo Score of B+ vs A-.

Sources & References

Mubboo may earn a commission on purchases made through affiliate links. This does not affect our Mubboo Score, product rankings, or editorial judgments. Prices are accurate as of the last sync (2026-06-19) and may change.