acetyl l carnitine peyronies Doctors Best Acetyl-L-Carnitine 1000 mg Per Serving - Supplement for Men & Women, Supports Brain & Nerve Cell Function, Mental Focus, Helps Generate Cellular Energy Acetyl-L-Carnitine 500 mg (60 Count)

It is the most abundant free amino acid in the human body and is involved in numerous physiological functions beyond protein synthesis

doi: 10.1210/endo-128-4-1857 70 JanvierSCheynsKCanfynMGoscinnySDe SpiegeleerBVanheeCet al

In conclusion, Phase II enzymes are an interesting research field since they play an essential role in the metabolism of hundreds of foreign compounds as well as in regulation of metabolism and disposition of various endogenous biologically active substances and thus maintaining homeostasis in the human body

PMID: 20840865 Marczak A, et al

This is the most common type you'll find in supplements