GHK-Cu is available through some compounding pharmacies
(2018) documented that liposomal glutathione supplementation at 500-1000 mg daily elevated blood glutathione stores over 1-6 months in healthy adults (Sinha et al., 2018)
There is a risk of mild diarrhoea, upset stomach, nausea, a feeling of pain and warm sensation at the site of the injection, a feeling or a sense of being swollen over the entire body, headache and joint pain
Endocrinology (2009) 150:112231.10.1210/en.2008-1241 40 HumphriesKMDealMSTaylorSS
These body composition optimization properties have generated interest in Tesamorelin for research into sarcopenic obesity, age-related body composition changes, and metabolic rehabilitation strategies for populations with abnormal fat distribution patterns
If you do a search through scientific articles, you will see tons of published studies dating back over a decade showing the benefits of glutathione