Based on the provided reference materials, the preparation of cosmetic peptide solutions involves a combination of advanced synthesis, extraction, structural modification, and strict formulation protocols.
Here is a comprehensive overview of the Preparation Steps.
Solvent Selection: Use sterile water, buffers (e.g., PBS), or cosmetic humectants like glycerin and butylene glycol to ensure solubility.
Dissolution: Gently add the solvent to the lyophilized peptide powder. Use slow magnetic stirring or gentle inversion.
Note: Avoid vigorous shaking to prevent foaming and protein denaturation.
Stabilization: Incorporate chelating agents (e.g., Disodium EDTA) to prevent metal-catalyzed degradation and preservatives (e.g., Phenoxyethanol) for microbial control.
Sterilization: Filter the final solution through a 0.22 μm membrane filter to ensure sterility.
Storage
Store at 2°C to 8°C (refrigerated) or freeze at -20°C for long-term stability. Avoid repeated freeze-thaw cycles.
