glutathione and hyperthyroidism can cause Oxidative stress in Hashimoto's thyroiditis: possible adjuvant therapies to attenuate deleterious effects | Molecular Cellular Biochemistry Frontiers Liposomal Glutathione & Thyroid Health

However, they are all meant to address different purposes

GHK-Cu + KPV avoids this by pairing KPV with a structurally and mechanistically unrelated peptide

Damage to nerve tissue (peripheral neuropathy), leading to pain, numbness, and weakness in extremities: These can be caused by the vitamins role in the proper functioning of the nervous system

When administering vitamin supplements via injection, a much higher concentration of nutrients is delivered directly to the body's cells, allowing the body to better absorb and utilise these

Addressing the problem while tissue retains regenerative capacity offers better outcomes than waiting until degeneration becomes established