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GHK-Cu generally shows better thermal stability in aqueous solutions, while AHK-Cu may require antioxidant systems for long-term formulation stability

Each shipment carries a tracking number, requires a signature on delivery, and is packed with thermal protection sized for the destination, season, and forecast route temperatures

When storing peptides for months or even years, freezing is optimal in order to preserve the peptides stability

Some practitioners implement cycling approaches (such as 12 weeks on, 4-8 weeks off), though no published research directly compares continuous versus cycled protocols