Effects of L carnitine on serum ammonia levels in (A) overall patients Download Scientific Diagram Neither L Carnitine nor Berberine work like caffeine, yohimbine, or fat burners. They do NOT: Spike your heart rate Jack up your nervous system Cause jitters or crashes Mask L Carnitine Metabolic Health Supplement Metagenics How Much L Carnitine Should I Take? A Guide The Science of Good Health L Carnitine 3000 per serving 180 Vegan Capsules L Carnitine Linus Pauling Institute Oregon State University