Comparison

L-Arginine 3,000 mg and L-Arginine 500

L-Arginine 3,000 mg (SuperiorLabs) lists 2 distinct ingredients and L-Arginine 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 0.52.

Amount per serving (and % of the Daily Value)
IngredientL-Arginine 3,000 mgL-Arginine 500
Arginine3,000 mg500 mg
Leucine0.05 g

Amounts are per serving as DSLD gives them: L-Arginine 3,000 mg, 5 vegetarian capsules; L-Arginine 500, 1 capsule. Current labels entered June 2020 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