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Topical vs Injectable Tolerability Topical GHK-Cu appears better tolerated than injectable forms, with topical side effects typically limited to mild redness, itching, or irritation at application site and rare copper uglies phenomenon (anecdotal accelerated skin aging appearance due to potential MMP upregulation, not well-studied)

This can result in a depletion of amino acids and key nutrients (such as zinc, selenium, B12, and iron/ferritin) needed for thyroid support, as well as for the synthesis of non-essential amino acids

But three specific peptides stand out for their direct action on pineal gland function and sleep architecture: Pinealon, Epitalon, and DSIP

In studies where beta-3 receptors were genetically deleted, AOD-9604 lost its fat-reducing effects, confirming the critical role of this pathway