In a clinical setting, physicians also can monitor liver function noninvasively with tests that record levels of certain enzymes and proteins in the blood, such as alanine aminotransferase (ALT) and aspartate aminotransferase (AST), which are released by liver cells, or hepatocytes, when the organ is damaged
Its also helped in so many other ways
The metabolism of L-dopa involves enzymes encoded by genes like COMT, CYP1A2, CYP2B6, CYP2C19, CYP2D6, CYP3A4, CYP3A5, DBH, DDC, G6PD, MAOB, TH, UGT1A1, and UGT1A9
77 In a controlled trial in 262 men with infertility related to poor sperm number, motility, and morphology, a combination of 1 gram of L-carnitine twice daily plus 20 mg CoQ10 three times daily resulted in greater improvement in sperm motility and a higher pregnancy rate than either supplement alone or placebo
Gatta M, Dovizio M, Milillo C, Ruggieri AG, Sallese M, Antonucci I, et al
doi: 10.1016/j.cvsm.2004.10.002