Comparison

Magnesium 500 mg and Magnesium 500

Magnesium 500 mg (Rexall) lists 1 distinct ingredients and Magnesium 500 (GNC) 1 (rows of one ingredient counted once); 1 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)
Ingredient	Magnesium 500 mg	Magnesium 500
Magnesium	500 mg (119%)	500 mg (119%)

Amounts are per serving as DSLD gives them: Magnesium 500 mg, 1 tablet; Magnesium 500, 1 capsule. Current labels entered April 2015 and October 2011. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own

Magnesium 500 mgRexall: every row against all products listing it
Magnesium 500GNC: every row against all products listing it