Life Extension Super K
Vitamin K Supplement, 2000 Mcg Vitamin K and 1180 Mcg Vitamin K2, Heart Health, Once-Daily, 90 Softgels
Price as of 2026-06-19. Check Amazon for the current price.
Quick Decision
Is This Right For You?
- •Risk-averse buyers — 6,906+ reviews give a highly reliable picture
- •Life Extension loyalists — the brand spans 44 products in our database
- •Sports Research ® Vitamin D3 4000 IU offers a better rating (4.8/5) at a similar or lower price ($18)
- •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+
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 |
| Rating | 4.6/5 | 4.4/5 | 4.8/5 | 4.7/5 |
| Reviews | 6,906 | 368,604 | 71,411 | 42,960 |
| Mubboo Score | B+ | A- | A | A+ |
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.
- Great Taste / No Unpleasant Flavor
- Convenient and Easy to Take
- Noticeable Health Benefits
- Clean Ingredient Profile
- Trusted Brand Reliability
- Side Effects / Adverse Reactions
- Delayed or Insufficient Results
- Cost / Supply Concerns
Related Video Reviews
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- 📹 Top 5 Supplements for Longevity, Performance, and Overall Health — Quinn Stillson MD
- 📹 Doctor Reveals the ONLY 6 Supplements Worth Your Money! — Doctor Youn
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.
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.