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Avoid GHK-Cu if you have Wilsons disease (due to the risk of copper accumulation), an active or history of certain cancers (due to growth factor effects and angiogenesis promotion), are pregnant or breastfeeding (safety not definitively established), or have known copper metabolism disorders or peptide allergies

798,799 Intravenous injection of histochrome significantly reduces cardiac fibrosis, increases capillary density, and significantly improves cardiac function in I/R rats by upregulating the expression of Nrf2 and its downstream genes, including GPX4, and reducing intracellular and mitochondrial ROS levels

Freezing reconstituted peptide damages the molecular structure through ice crystal formation and reduces bioactivity

A useful combination targets a different rate-limiting step in the same pathway