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GHK-Cu has no human pregnancy or lactation data

Continued use may result in epithelial breakdown, corneal degeneration (corneal thinning, corneal erosion), corneal ulceration, or corneal perforation in susceptible patients

your provider may also check methylmalonic acid (MMA) or homocysteine for a more complete picture

Common side effects are typically mild and transient: Pain, redness, or swelling at the injection site (most frequent) Mild diarrhoea or gastrointestinal upset Headache or dizziness shortly after administration Itching or mild skin reactions Temporary pink/red discolouration of urine These effects usually resolve within 2448 hours without intervention

Despite their diverse pharmacological properties, these drugs converge on shared neurotoxic pathways, including oxidative stress, mitochondrial dysfunction, excitotoxicity, and neuroinflammation