glycine nac and glutathione Pure Encapsulations + Powder - Immune Support, Detox Cleanse & Production* - Conditionally Essential Amino Acids - Gluten Free & Non-GMO N-Acetyl Cysteine (NAC) + Glycine

474-82, (2016) (PubMed)

Abbreviations -ECS -Glutamylcysteine synthetase ABA Abscisic acid APX Ascorbate peroxidase AsA Ascorbate CAT Catalase Cys Cysteine DHAR Dehydroxyascorbate reductase Glu Glutamine Gly I Glyoxalase I (Lactoylglutathione lyase) Gly II Glyoxalase II (Hydroxyacylglutathione hydrolase) GPX Glutathione peroxidase GR Glutathione reductase GSH Glutathione GSHS Glutathione synthase GSNO S -Nitrosoglutathione GSSG Glutathione disulfide GST Glutathione S -transferase JA Jasmonic acid MAP Mitogen activated protein MDA Malondialdehyde MG Methylglyoxal NADPH Nicotinamide adenine dinucleotide phosphate NO Nitric oxide PC Phytochelatin PCS Phytochelatin synthase POD Peroxidase ROS Reactive oxygen species SA Salicylic acid SLG S -d-Lactoylglutathione SOD Superoxide dismutase Compliance with ethical standards Conflict of interest The authors declare no conflicts of interest

And unlike steroid hormones, which stay in the body a long time, peptides have a very short half-life, so they have been shown to be extremely safe

10.1021/ja411006a J