Comparison

MCB Magnesium, Calcium, Boron and Cal-Mag

MCB Magnesium, Calcium, Boron (Complete H2O Minerals) lists 3 distinct ingredients and Cal-Mag (Zemvelo) 3 (rows of one ingredient counted once); 3 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)
IngredientMCB Magnesium, Calcium, BoronCal-Mag
Calcium25 mg (2%)72 mg (6%)
Magnesium75 mg (18%)63 mg (15%)
Boron0.5 mg0.5 mg

Amounts are per serving as DSLD gives them: MCB Magnesium, Calcium, Boron, 5 ml; Cal-Mag, 5 ml. Current labels entered May 2013 and June 2020. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own