Super K
How we scored this product Show the full breakdown
Bevisning gates dose: the evidence grade sets the ceiling, and the dose decides how much of that ceiling the product reaches. Value = inverse of price-per-trial-dose-day. Community = mean sentiment of external reviews. Säkerhet caps applied after weighting.
This score is our editorial judgment, not a scientific standard. We combine published evidence, dose, price, transparency, and consumer signals into one composite: this is our method, not a peer-reviewed clinical rating. A higher score means a product does better on the factors we weight, not that it is medically proven to work.
Question 1
Does the molecule work?
Does the molecule work?
Question 2
Is this bottle good?
Is this bottle good?
The specific product: dose, price, transparency, and what buyers report.
Question 3
What's the catch?
What's the catch?
Säkerhet flags, transparency gaps, dosing concerns, and recurring buyer complaints.
Quick verdict
The numbers
Data verification
Per-ingredient breakdown
All product data is checked against original sources. Prices, doses, and testing status are updated when product pages change. Bevisning grades are reviewed when new human RCTs are published. Read how we verify.
What's inside
Consumer signals
Consumer signals gathered from 3 platforms.
High confidenceConsumer sentiment compiled from 3 public sources.
mixed sentiment
Compiled from Amazon listing located during research; verified at build time.
positive sentiment
Compiled from iHerb listing located during research; verified at build time.
831 reviews · positive sentiment
Compiled from Amazon (ReviewIndex aggregation) listing located during research; verified at build time.
These are consumer sentiment signals. They do not measure whether the product actually works. See our evidence section for that.
What others say (unverified)
No external reviews aggregated yet for this product.
Research behind this product
The studies that established the trial dose and evidence grade for each active ingredient in this product. Click through to read the original paper.
Redaktionellt notes
A tri-form vitamin K product (K1 + MK-4 + branded MenaQ7 MK-7), more complete than most single-form K2 produkter on the market, aimed at arterial calcification / bone health rather than a specific longevity mechanism, but relevant to the vascular-health side of healthy aging.
Why this scored this way
This Life Extension Super K scores 5.8, making it below the site average. It contains 10.0mg of Vitamin C, which is only 2% of the 500mg trial dose with grade A evidence (strong human trial data). At $16.67/day it's among the more expensive options in Vitamin.
What drives the score up
- Tested by independent lab (transparency 8.0).
What drags it down
- Dose-evidence score of 5.2 is below average for the site.
- Overall dose is only 2% of the trial dose across ingredients.
- Vitamin C (10.0mg is 2% of the 500mg trial dose) is significantly under-dosed.
- No public analysintyg available for independent verification.
- Limited consumer feedback (community score: 6.0).
Why you'd choose it
- You want Vitamin C from a Life Extension product.
- You want a tested by independent lab product.
Why you might skip it
- You want a product with a publicly available CoA.
- You need a full trial dose of vitamin c (this product under-doses it).
- You want a cheaper option (this is $16.67/day).
Where this sits
Spot an error?
If you are the manufacturer or brand owner of Super K and believe any data on this page is incorrect (wrong dose, wrong ingredient, wrong price, missing certification, outdated status), you can request a correction.
We review every request, verify it against primär sources, and publish any change with a dated note in the version history above. Corrections from brand owners are treated the same as corrections from anyone else: verified before they move.
Request a correction →Similar produkter
All Vitamin →The next highest-scoring produkter in Vitamin, same scoring method, same rules.