Comparison

Calcium 500 + D3 and Chewable Calcium 500 mg & D3

Calcium 500 + D3 (21st Century) lists 2 distinct ingredients and Chewable Calcium 500 mg & D3 (Windmill) 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.

Amount per serving (and % of the Daily Value)
IngredientCalcium 500 + D3Chewable Calcium 500 mg & D3
Calcium500 mg (38%)500 mg (38%)
Vitamin D15 mcg (75%)15 mcg (75%)

Amounts are per serving as DSLD gives them: Calcium 500 + D3, 1 tablet; Chewable Calcium 500 mg & D3, 1 wafer. Current labels entered October 2021 and July 2020. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own