Comparison
Calcium Citrate & Vitamin D3 and Oyster Shell Calcium 500 +D Extra Vitamin D Value Size
Calcium Citrate & Vitamin D3 (Bluebonnet) lists 2 distinct ingredients and Oyster Shell Calcium 500 +D Extra Vitamin D Value Size (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 | Calcium Citrate & Vitamin D3 | Oyster Shell Calcium 500 +D Extra Vitamin D Value Size |
|---|---|---|
| Calcium | 1,000 mg (77%) | 1,000 mg (77%) |
| Vitamin D | 20 mcg (100%) | 20 mcg (100%) |
Amounts are per serving as DSLD gives them: Calcium Citrate & Vitamin D3, 4 caplets; Oyster Shell Calcium 500 +D Extra Vitamin D Value Size, 2 tablets. Current labels entered June 2025 and July 2012. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.
Each product on its own
- Calcium Citrate & Vitamin D3Bluebonnet: every row against all products listing it
- Oyster Shell Calcium 500 +D Extra Vitamin D Value Size21st Century: every row against all products listing it