Methionine is susceptible to oxidation, particularly in the presence of light and dissolved oxygen
76 Also, with some Class I variants the oxidation of membrane sulfhydryl groups leads to the accumulation of membrane polypeptide aggregates, presumably due to disulfide bond formation between spectrin dimers and other membrane proteins
In humans with a zinc shortage, TSH, T3, and T4 decrease as well, and patients with hypothyroidism often have decreased levels of zinc and copper (116)
The available data is reassuring, but long-term (5+ year) safety data at wellness protocol doses is not yet available in the literature
In animal models, topical GHK-Cu application significantly improved wound healing rates, increased collagen deposition, and enhanced the tensile strength of healed tissue