Some patients experience mild injection site reactions (redness, slight swelling) which typically resolve quickly
This suggests that these participants were closer to obtaining a threshold in their glutathione levels leading to positive changes in behavior
Related: How to Prevent Fatty Liver Disease Glutathione deficiency is rampant We're born with plenty of glutathione in our body
doi:10.1177/0891988712436688, PMID: 22467846 Jeong YY, Park HJ, Cho YW, Kim EJ, Kim GT, Mun YJ, Lee JD, Shin JH, Sung NJ, Kang D, Han J (2012) Aged red garlic extract reduces cigarette smoke extract-induced cell death in human bronchial smooth muscle cells by increasing intracellular glutathione levels
Bubshait DK, Rashid A, Al-Owain MA, Sulaiman RA
Allergic reactions to incretin-based therapies can range from mild local reactions to severe systemic hypersensitivity, including anaphylaxis in rare cases