MC1R is a G-protein-coupled receptor (GPCR) that, upon agonist engagement, activates the Gs/adenylate cyclase pathway, increasing intracellular cAMP and activating PKA-linked signalling cascades that upregulate tyrosinase activity and drive eumelanin synthesis the dark, UV-protective form of melanin
This can lead to excess circulating levels of cholesterol and cholesteryl esters when the dietary intake of fat and cholesterol exceeds the needs of the body
Common side effects include nausea, constipation, and fatigue, particularly during dose escalation
As mentioned, the oxidative stress and inflammatory state in stroke patients can suppress protein synthesis and drive them to malnutrition [9]
Researchers suggest that this decline may contribute to the reduced regenerative capacity (such as slower wound healing) of older adults.12 This could mean that, theoretically, adding supplemental GHK to aging skin in the form of products containing GHK-Cu may help it act like younger skin