L-Carnitine Fumarate
L-Carnitine Fumarate is a unrated form of L-Carnitine, used in 227 on-market products and providing 58.1% elemental l-carnitine by weight.
227
on-market products
unrated
quality tier
58.1%
elemental fraction
Basis: C7H15NO3 x C4H4O4, 1:1 (161.20 / 277.20); matches a real label: 862mg L-carnitine fumarate alongside 500mg L-carnitine (0.580)
Why this tier: No head-to-head human bioavailability or efficacy comparison of this form was located in PubMed searches.