is l carnitine only from animals L-CARNITINE 100ML INJECTION L-carnitine: Science-Backed Benefits, Risks, and
Description
Extensive preclinical and clinical research studies have confirmed the positive role that l-carnitine treatment has in male and female fertility [90,91,92,93], pregnancy, premature neonates [94,95,96]

My review of the available research seems to indicate that L-carnitine is considered a safe, affordable option but that, clearly, there is not a large or consistent enough body of evidence to make a strong claim for people living with NAFLD to consider this supplement a must
This rare condition can lead to: low plasma carnitine progressive cardiomyopathy, or heart muscle disease skeletal myopathy hypoglycemia hypoammonemia weak muscles in the hips, shoulders upper arms, legs, neck, and jaw muscles Untreated it is fatal

"-Carnitine supplementation for adults with end-stage kidney disease requiring maintenance hemodialysis: a systematic review and meta-analysis"
