Comparison

Soy Isoflavones and Calcium Citrate Calcium + Soy

Soy Isoflavones (The Vitamin Shoppe) lists 4 distinct ingredients and Calcium Citrate Calcium + Soy (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 0.41.

Amount per serving (and % of the Daily Value)
IngredientSoy IsoflavonesCalcium Citrate Calcium + Soy
Calcium300 mg (23%)500 mg (38%)
Soy2,334 mg50 mg
Phosphorus232 mg (19%)
Soy Protein400 mg

Amounts are per serving as DSLD gives them: Soy Isoflavones, 4 tablets; Calcium Citrate Calcium + Soy, 2 tablets. Current labels entered January 2016 and August 2012. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own