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A published gene expression study reported that GHK-Cu modulates the expression of over 4,000 human genes, including those involved in tissue remodelling and antioxidant defence

Across more than 100 preclinical publications many from a single research group led by Sikiri and colleagues the peptide has demonstrated healing effects on tendon, muscle, bone, nerve, and gut tissue, often with no reported acute toxicity even at doses far exceeding those proposed for practical use

When we measured the TMA that the gut microbes produced in the second experiment, we saw much less TMA

But for the most part, the neurons you have at about age 25 are the neurons that you're going to have for the rest of your life