Comparison
K-2 with Nattokinase and Vitamin K 2
K-2 with Nattokinase (Swanson) lists 2 distinct ingredients and Vitamin K 2 (Signature Supplements) 2 (rows of one ingredient counted once); 2 are on both labels. On the site's similarity measure, which compares ingredient lists (1 for the same list, rarer ingredients counting for more; amounts are not part of it), the two formulas score 1.00: the same ingredients, at the amounts in the table below.
| Ingredient | K-2 with Nattokinase | Vitamin K 2 |
|---|---|---|
| Vitamin K | 50 mcg (42%) | 200 mcg (167%) |
| Nattokinase | 100 mg | 200 mg |
Amounts are per serving as DSLD gives them: K-2 with Nattokinase, 1 softgel; Vitamin K 2, 2 capsules. Current labels entered February 2019 and August 2025. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.
Each product on its own
- K-2 with NattokinaseSwanson: every row against all products listing it
- Vitamin K 2Signature Supplements: every row against all products listing it