Comparison

Acetyl-L-Carnitine 750 mg and Acetyl L-Carnitine 1500 mg

Acetyl-L-Carnitine 750 mg (NOW) lists 1 distinct ingredients and Acetyl L-Carnitine 1500 mg (NaturaLife 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	Acetyl-L-Carnitine 750 mg	Acetyl L-Carnitine 1500 mg
Acetyl L-Carnitine	1,500 mg	1,500 mg

Amounts are per serving as DSLD gives them: Acetyl-L-Carnitine 750 mg, 2 tablets; Acetyl L-Carnitine 1500 mg, 2 capsules. Current labels entered July 2019 and June 2020. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own

Acetyl-L-Carnitine 750 mgNOW: every row against all products listing it
Acetyl L-Carnitine 1500 mgNaturaLife Labs: every row against all products listing it