Comparison

SAM-e 400 mg Double Strength and SAM-e 200 mg

SAM-e 400 mg Double Strength (PhysioLogics) lists 3 distinct ingredients and SAM-e 200 mg (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 0.61.

Amount per serving (and % of the Daily Value)
IngredientSAM-e 400 mg Double StrengthSAM-e 200 mg
SAMe400 mg200 mg
Vitamin C1.17 mg (1%)
Riboflavin0.82 mg (63%)

Amounts are per serving as DSLD gives them: SAM-e 400 mg Double Strength, 1 tablet; SAM-e 200 mg, 1 tablet. Current labels entered December 2011 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