PlainVitamins

Vitamin K2

by Source Naturals · tablet or pill · 100 mcg

  • Off the market since September 2017 (NIH)
  • UPC 0 21078 01921 3
  • DSLD label 652
  • Serving 1 tablet
  • 30 servings

Vitamin K2 by Source Naturals lists 4 ingredients, 4 with an amount per serving of 1 tablet, such as 400 IU (10 mcg) of vitamin D3, 100 mcg of vitamin K, 200 mg of calcium and 100 mg of bacillus subtilis natto extract. Its current label entered the NIH Dietary Supplement Label Database on October 26, 2011.

What is in Vitamin K2?

Each row as the label prints it, per serving of 1 tablet. 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).

Vitamin K2: Supplement Facts rows against the market (DSLD label 652, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin D3400 IU (10 mcg)100%Vitamin D in Vitamin K2 against 14,175 products10 mcg per serving; the middle half of products list 10 mcg to 25 mcg, the median 15 mcg.DV 20 mcgUL 100 mcg10 mcg

57% of 14,175 products listing vitamin D give more (median 15 mcg).

Vitamin Kas Menaquinone-7Vitamin K (Form: as menaquinone-7)100 mcg130%Vitamin K in Vitamin K2 against 4,607 products100 mcg per serving; the middle half of products list 35 mcg to 100 mcg, the median 80 mcg.DV 120 mcg100 mcg

Higher than 69% of 4,607 products listing vitamin K (median 80 mcg).

Calcium200 mg20%Calcium in Vitamin K2 against 17,831 products200 mg per serving; the middle half of products list 50 mg to 252 mg, the median 115 mg.DV 1,300 mgUL 2,500 mg200 mg

Higher than 64% of 17,831 products listing calcium (median 115 mg).

Bacillus subtilis Natto Extract100 mgBacillus Subtilis in Vitamin K2 against 133 products100 mg per serving; the middle half of products list 5 mg to 25 mg, the median 10 mg.100 mg

Higher than over 99% of 133 products listing bacillus subtilis (median 10 mg).

Source: NIH ODS Dietary Supplement Label Database, label 652 (entered October 26, 2011), 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?

The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:

  • Its 100 mg of bacillus subtilis is higher than over 99% of the 133 bacillus subtilis products that print an amount.

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?

The products whose ingredient lists overlap most with Vitamin K2's, rare ingredients counting for more.

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 Use: 1 tablet daily, preferably with a meal.
Warnings
Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children.
Contains milk/dairy and soy.
CAUTION: Consult your health care professional before taking this product if you are pregnant, may become pregnant, breastfeeding, or if you are taking anticoagulant drugs such as warfarin.
Allergens and what it does not contain
Contains no yeast, egg, gluten or wheat. Contains no sugar, salt, preservatives, or artificial color, flavor or fragrance.

Source: label statements in DSLD label 652.

What else is on the label?

Other ingredients: Dibasic Calcium Phosphate, Stearic Acid, Silicon Dioxide, Colloidal, modified Cellulose Gum, Magnesium Stearate.

How many labels does Vitamin K2 have?

One label is on file, entered on October 26, 2011.

  1. Label 652 (current) Entered October 26, 2011 · off the market September 5, 2017 · 100 mcg · UPC 0 21078 01921 3

DSLD also links this label to: Vitamin K2 100 mcg (package size difference, same product), Vitamin K2 100 mcg (image difference, same product), Vitamin K2 100 mcg (package size difference, same product), Vitamin K2+D3 (package size difference, same product).

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names Source Naturals, Inc. (manufacturer), Santa Cruz, CA. All Source Naturals products.

Where next?