Compare silk peptide vs. sialic acid for skincare radiance. Learn how silk peptide improves light reflection through surface smoothing and hydration, while sialic acid supports biological brightening and more even-looking tone. Includes formulation guidance for OEM and ODM brands.

This guide reviews ten China-based silk fibroin and silk-protein suppliers relevant to cosmetic and personal-care sourcing. It compares their product focus, transparency, customization potential, and buying risks, while providing a practical supplier-verification workflow for international brands, distributors, and contract manufacturers.