propionyl l carnitine acetyl l carnitine Swanson L-Carnitine with Glycine, Amino Acid, 60 Vegan Capsules, 2 Pack Glycine propionyl-L-carnitine - Wikipedia

The confirmed harms were a small increase in liver enzymes, a roughly 1% incidence of muscle symptoms, and a modest rise in blood sugar in patients already near the diabetes threshold

That tells me to avoid oversimplifying the case

A Review Flavour Fragr J 25:291312 Milardovic S, Ivekovic D, Grabaric BS (2006) A novel amperometric method for antioxidant activity determination using DPPH free radical

The paperwork is genuinely strong once you are through that door, but the door is the catch

Furthermore, immunocompromised animals are commonly used in these experiments, such that the important role of the immune system may not be recapitulated