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L-carnitine is a compound made from amino acids and found in meat. Supplements come as ready-to-drink liquids, capsules and powders, often as L-carnitine tartrate. Compare milligrams per serving and the form, and note that liquids may contain sweeteners.
Part of the weight management range; see also CLA.
L Carnitine: questions
What is the difference between liquid and capsule L-carnitine?
Only the format. Compare the milligrams of L-carnitine per serving on each label.
Does L-carnitine contain caffeine?
Plain L-carnitine does not, but some blends add it. Check the label.

