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These effects mean GHK-CU should, theoretically, calm irritated skin rather than worsen it
Its 28-day usability window after opening is specifically designed for this use case, and using sterile water in a multi-dose context introduces a real and unnecessary contamination risk with every additional needle insertion
Research institutions and individual researchers are responsible for proper use, handling and disposal of the compound according to applicable regulations and institutional policies
doi: 10.3389/fendo.2023.1120533
Starting at 3% or higher virtually guarantees some level of irritation for most users
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