Comparison

Pure L-Arginine L-Pyroglutamate Powder and L-Arginine

Pure L-Arginine L-Pyroglutamate Powder (Hard Rhino) lists 1 distinct ingredients and L-Arginine (Purus Labs) 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	Pure L-Arginine L-Pyroglutamate Powder	L-Arginine
Arginine	2,000 mg	2,000 mg

Amounts are per serving as DSLD gives them: Pure L-Arginine L-Pyroglutamate Powder, 2 mg; L-Arginine, 4 veggie capsules. Current labels entered June 2014 and March 2025. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own

Pure L-Arginine L-Pyroglutamate PowderHard Rhino: every row against all products listing it
L-ArgininePurus Labs: every row against all products listing it