How Does Carnitine Support Hashimoto's? Dr. Izabella Wentz This one is for my gym crowd, and those regularly using protein powders and supplements for sports performance or weight loss Do any of your supplements contain Acetyl L Carnitine? If you Altered carnitine acylcarnitine profiles in levothyroxine treated congenital hypothyroid patients with fatigue: An LC MS MS based study from Bangladesh PLOS One L carnitine supplementation for the management of fatigue in patients with hypothyroidism on levothyroxine treatment: a randomized, double blind, placebo controlled trial. Semantic Scholar ONLY NATURAL PET Thyroid Support Supplement for Cats Multivitamin with L Carnitine & Lemon Balm Vet