Comparison

Alpha Lipoic Acid and Alpha Lipoic Acid 600 mg - Extra Strength

Alpha Lipoic Acid (Progressive Professional from Progressive Laboratories) lists 2 distinct ingredients and Alpha Lipoic Acid 600 mg - Extra Strength (NOW) 3 (rows of one ingredient counted once); 2 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 0.68.

Amount per serving (and % of the Daily Value)
Ingredient	Alpha Lipoic Acid	Alpha Lipoic Acid 600 mg - Extra Strength
Black Pepper	10 mg	5 mg
Alpha Lipoic Acid	200 mg	600 mg
Grape		30 mg

Amounts are per serving as DSLD gives them: Alpha Lipoic Acid, 2 capsules; Alpha Lipoic Acid 600 mg - Extra Strength, 1 veg capsule. Current labels entered April 2022 and July 2014. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own

Alpha Lipoic AcidProgressive Professional from Progressive Laboratories: every row against all products listing it
Alpha Lipoic Acid 600 mg - Extra StrengthNOW: every row against all products listing it