Acetyl-L-Carnitine (ALC)
Acetyl-L-Carnitine (ALC) is a unrated form of L-Carnitine, used in 709 on-market products and providing 79.3% elemental l-carnitine by weight.
709
on-market products
unrated
quality tier
79.3%
elemental fraction
Basis: C9H17NO4 inner salt, MW 203.24 (L-carnitine 161.20 / 203.24); expresses the L-carnitine equivalent of the declared ALC weight
Why this tier: A different molecule from L-carnitine with its own evidence base (diabetic neuropathy, mood); no human study compares ALC with L-carnitine on carnitine delivery or the same outcomes, so no tier is assigned.
Source: Sima AA et al. 2005, Diabetes Care 28(1):89-94, PMID 15616239