Comparison
B-12 1000 mcg and Prolonged Release B-12 1000 mcg
B-12 1000 mcg (21st Century) lists 2 distinct ingredients and Prolonged Release B-12 1000 mcg (21st Century) 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 | B-12 1000 mcg | Prolonged Release B-12 1000 mcg |
|---|---|---|
| Calcium | 100 mg (8%) | 100 mg (8%) |
| Vitamin B12 | 1,000 mcg (41667%) | 1,000 mcg (41667%) |
Amounts are per serving as DSLD gives them: B-12 1000 mcg, 1 tablet; Prolonged Release B-12 1000 mcg, 1 tablet. Current labels entered August 2019 and April 2013. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.
Each product on its own
- B-12 1000 mcg21st Century: every row against all products listing it
- Prolonged Release B-12 1000 mcg21st Century: every row against all products listing it