nature's bounty alpha lipoic acid & acetyl l carnitine Acetyl-L-Carnitine Nature's Bounty L-Carnitine Amino Acid
Description
It has several isomers that have effects on metabolism

Yamaguti, G

L-carnitine does this cellular work both when you exercise and rest, but research confirms that it is especially effective during intense exercise
Methimazole is taken 1 to 3 times a day and can be continued during their lifespan

Vegetarian/Vegan Product NOW L-Carnitine 3X Liquid provides 3 to 6 times (3 g) the potency of competing brands per serving size