Comparison

Glucosamine, Chondroitin, Vitamin C & Calcium and Glucosamine Sulphate 2KCl 500 mg & Marine Chondroitin 400 mg (20%)

Glucosamine, Chondroitin, Vitamin C & Calcium (SimplyValue) lists 5 distinct ingredients and Glucosamine Sulphate 2KCl 500 mg & Marine Chondroitin 400 mg (20%) (SimplySupplements) 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 0.83.

Amount per serving (and % of the Daily Value)
IngredientGlucosamine, Chondroitin, Vitamin C & CalciumGlucosamine Sulphate 2KCl 500 mg & Marine Chondroitin 400 mg (20%)
Chondroitin Sulfate100 mg400 mg
Glucosamine Sulfate0.41 g0.5 g
Chondroitin (unspecified)20 mg80 mg
Vitamin C80 mg (89%)
Calcium60 mg (5%)

Amounts are per serving as DSLD gives them: Glucosamine, Chondroitin, Vitamin C & Calcium, 1 tablet; Glucosamine Sulphate 2KCl 500 mg & Marine Chondroitin 400 mg (20%), 1 capsule. Current labels entered May 2013 and July 2013. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own