l carnitine not working L-Carnitine is Underrated. New Meta Review Reminds Us Why New research says L-carnitine might

For treatment of primary systemic carnitine deficiency, a genetic impairment of normal biosynthesis or utilization of levocarnitine from dietary sources, or for the treatment of secondary carnitine deficiency resulting from an inborn error of metabolism such as glutaric aciduria II, methyl malonic aciduria, propionic acidemia, and medium chain fatty acylCoA dehydrogenase deficiency

Standard doses rarely cause clinically significant changes, but monitor if you have hypotension or take blood pressure medications

U., Rivella, S., Hentze, M

Many users notice improvements in skin clarity and firmness

Izumiya et al., 2009)

Driller MW, Dunican IC, Omond SET, et al