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Rat studies using collagen tubes containing GHK-Cu showed increased nerve fiber regeneration, increased axon count, increased Schwann cell proliferation, and restored skin innervation in healing wounds

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Nature Medicine, 28(10), 2083-2091

Available at: (Accessed: 21st July 2015) (2015)

It says it will remove products from the market if they claim to treat or change how the body works if they are not licensed under the Human Medicines Regulations Act 2012, and that it strongly advises against purchasing and using unauthorised medicinal products - "particularly those promoted on social media"