n-acetylcysteine substitute for glutathione and Its Immunomodulatory Properties in Humans and Domesticated Animals Getting a Knack for NAC:

It directly neutralizes free radicals and reactive oxygen species that can damage cellular components like DNA, proteins, and lipids

Li, Qureshi 2013

Insulin tolerance tests were performed in 3-hourfasted mice by intraperitoneal injection of 1.4 mU insulin/kg body mass on chow diet or 2 mU insulin/kg body mass on HFD

The fact that many of these natural molecules are introduced through diet underscores the importance of dietary intervention to correct predisposition and life-style disorders

Side effects Given by a trained injector in appropriate doses, glutathione has a strong safety record and most people have no issues at all

doi: 10.1016/j.jns.2009.08.052