l-carnitine and thyroid l carnitine effect on The Role of in Kidney Disease Related Metabolic Dysfunctions Frontiers Didn't another study show carnitine

If a patient does smoke on the day of surgery, it should be at least two hours before the procedure, according to the American Society of Regional Anesthesia and Pain Medicine, because smoking marijuana can significantly increase heart rate and blood pressure within the two hours following use, and it may increase the patients risk of suffering a surgery-related heart attack. It's also unclear when its safe to resume marijuana use following surgery

This supplement also acts as an antioxidant that helps protect the skin from harmful free radicals

Thats where glutathione steps in to calm the damage

2007;21(Suppl 1):3146