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Studies on human sleep behavior and chronic insomniac patients reveal that the peptide improves sleep architecture and sleep structure by promoting slow-wave (delta) sleep and supporting restorative, non-REM sleep (1)
Life Extensions product is tested independently for safety by a third party and isnt too expensive either, especially if you subscribe
Two studies from Seoul National University (Republic of Korea) found the effects of GHK-Cu and GHK copper-free on cell differentiation on a skin equivalent cell culture system produced identical results
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