half life of l carnitine L-Carnitine | Linus Pauling Institute BeastLife L-Carnitine Liquid | 1100mg

A deficiency can therefore occur if there is too little meat and too few other animal products on the menu

Abstract Introduction: To evaluate the efficacy of a novel eye drop formulation containing hyaluronic acid (0.2%) and butyroyl-glutathione (GSHC4, 0.4%) in glaucoma-associated ocular surface disease (G-OSD), and to explore putative mechanisms of action through in vitro assays of corneal epithelial wound healing and cytokine modulation under basal, inflammatory, and oxidative stress conditions

I'd be inclined to think it was mainly nerves - doctors are frequently quite bad at giving injections or doing any blood work and cause more pain as a result than nurses who are doing it more frequently

Pharmaceutical Research 2010