Vitamin K-2
by U.S. Longevity Institute · capsule · 100 veg capsules
- Off the market since October 2024 (NIH)
- DSLD label 228454
- Serving 1 vegetarian capsule
Vitamin K-2 by U.S. Longevity Institute lists 2 ingredients, 2 with an amount per serving of 1 vegetarian capsule, such as 100 mcg of vitamin K2 and 250 mg of alfalfa powder. Its current label entered the NIH Dietary Supplement Label Database on June 24, 2020.
What is in Vitamin K-2?
Each row as the label prints it, per serving of 1 vegetarian capsule. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Vitamin K2as Menaquinone-4Vitamin K2 (Form: as Menaquinone-4 (Alt. Name: MK-4)) | 100 mcg | 83% | Higher than 69% of 4,607 products listing vitamin K (median 80 mcg). |
| Alfalfa powder | 250 mg | Higher than 55% of 477 products listing alfalfa (median 200 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 228454 (entered June 24, 2020), version 9.4.0. See the label on DSLD. Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.
Is that a lot?
Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.
The NIH database records one serving a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.
The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.
Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.
Which products have the closest formulas?
5 products list the very same ingredients; the nearest amounts come first.
- Vitamin K-2 100 mcgLuckyVitamin same ingredients
- Vitamin K-2 100 mcgNOW same ingredients
- Vitamin K2 100 mcgBIOVEA same ingredients
- Vitamin K-2 MK-4 100 mcgBiophix same ingredients
- MK-7 Plus with K1 & MK-4NOW same ingredients
- Alfalfa 500 mgVitamin World 1 shared, 56% alike
Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.
What does the label say about taking it?
Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.
- Directions
- Suggested usage: Take 1 capsule daily with a meal.
- Warnings
- Caution: For adults only.
- Do not use if pregnant, nursing or allergic or contraindicated to aspirin. consult physician if taking medication (especially blood thinners such as warfarin, Coumadin, heparin and aspirin) or have a medical condition.
- Discontinue use two weeks prior to surgery or if stomach upset occurs.
- Keep out of reach of children.
- Do not eat freshness packet. Keep in bottle.
- Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
- Allergens and what it does not contain
- Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients.
- Non-GMO
- Storage
- Store in a cool, dry place after opening.
Source: label statements in DSLD label 228454.
What else is on the label?
Other ingredients: Cellulose, Ascorbyl Palmitate, Rice Flour, Silica.
How many labels does Vitamin K-2 have?
One label is on file, entered on June 24, 2020.
- Label 228454 (current) Entered June 24, 2020 · off the market October 31, 2024 · 100 veg capsules
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names U.S. Longevity Institute (distributor), Mechanicsburg, PA. All U.S. Longevity Institute products.