It is recommended to store Melanotan-II at -20°C. Low temperatures slow down chemical reaction rates and reduce the likelihood of reactions with environmental factors such as oxygen and moisture, thereby preventing degradation, oxidation, or other forms of spoilage.
Ensure the packaging is tightly sealed during storage to prevent the ingress of air and moisture. Avoid repeated freeze-thaw cycles, as these can lead to peptide aggregation, reduced activity, or structural damage, all of which compromise efficacy. If multiple uses are required, aliquot the product into smaller portions and retrieve a single portion for each use.