Comparison

Carnitine Complex and Optimized Carnitine With GlycoCarn

Carnitine Complex (Solgar) lists 4 distinct ingredients and Optimized Carnitine With GlycoCarn (Life Extension) 3 (rows of one ingredient counted once); 3 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 0.83.

Amount per serving (and % of the Daily Value)
IngredientCarnitine ComplexOptimized Carnitine With GlycoCarn
Acetyl L-Carnitine250 mg800 mg
Glycine propionyl-l-carnitine250 mg300 mg
Acetyl L-Carnitine Arginate250 mg300 mg
L-Carnitine500 mg

Amounts are per serving as DSLD gives them: Carnitine Complex, 2 tablets; Optimized Carnitine With GlycoCarn, 2 vegetarian capsules. Current labels entered April 2020 and April 2016. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own