Yes, in recommended doses, L carnitine is considered safe, but consult with a healthcare provider for best results
Toxicol In Vitro (2009) 23(5):7808
Allergic reactions: Although uncommon, allergic reactions can occur
Goodman HM
This interruption may lead to the accumulation of senescent cells - those that have stopped dividing but do not die, contributing to cell aging

sometimes mild right upper quadrant discomfort, hepatomegaly, acanthosis nigricans, or cryptogenic cirrhosis Often associated with features of metabolic syndrome: type 2 diabetes, obesity, dyslipidemia (hypertriglyceridemia, low HDL cholesterol, hypobetalipoproteinemia), and cardiovascular disease Increased AST and ALT levels (usually 2.0 Acute decompensated Wilson disease Anhepatic Primary nonfunction of allograft within 7 d of transplant Hepatic artery thrombosis within 7 d of transplant Cirrhosis from any cause MELD-Na score, calculated MELD-Na score exceptions Hepatocellular carcinoma Perihilar cholangiocarcinoma Hepatopulmonary syndrome Portopulmonary hypertension Primary hyperoxaluria Familial amyloid polyneuropathy Cystic fibrosis Metabolic disease (urea cycle disorder or organic acidemia) Hepatic artery thrombosis (within 14 d of transplant but does not meet criteria for status 1A) Appeal to regional review boarda Abbreviations: ICU, intensive care unit