Safety is unknownand potentially problematic
10.17305/bjbms.2020.4711 Bosn J Basic Med Sci
[6] The concentration-response profile of the collagen effect detectable at extremely low concentrations and independent of cell proliferation argues that the intact tripeptide is doing something more specific than passively supplying metal
Lifestyle modifications, including reducing toxin buildup (e.g., refraining from heavily processed foods, chemicals, and substances), while consuming whole nutrient-dense foods (e.g., phytonutrients, brassica veggies, and quality proteins, including rich sources of cysteine and selenium for GSH synthesis), getting adequate sleep, movement, sunshine and circadian rhythm balance, as well as mitigating stress are all valuable tools for supporting glutathione (17-21)
GHK-Cu copper peptide body lotion in a full-size 8 oz (5,000 mg) bottle, formulated at a 2% concentration within the range used in cosmetic studies of GHK-Cu
Skin Discoloration or Hyperpigmentation : Long-term use of glutathione injections for skin lightening can result in unintended skin discoloration, uneven pigmentation, or hyperpigmentation