How do you prevent serum discoloration, oxidation, or odor change over shelf life?

Quick Answer (for busy buyers)

Here’s the buyer-first summary. If your brand name is on the label, you usually act as the responsible person and must ensure the listing is submitted and kept current.

• To prevent serum discoloration, oxidation, or odor change over shelf life, we employ robust formulation and packaging strategies.
• In formulation, we use antioxidants like vitamin E or ferulic acid, and chelating agents to inhibit metal-catalyzed reactions.
• Packaging is critical; we recommend amber glass bottles with airless pumps to block light and oxygen, reducing oxidation risk.
• For UK projects, MOQ starts at 3,000-5,000 units to justify stability testing costs, ensuring batch consistency.
• Sampling takes 3-4 weeks for lab adjustments and initial stability checks, including viscosity and pH monitoring.
• Production lead time is 6-8 weeks after approval, covering microbial testing, filling at controlled temperatures, and QA for leakage.
• We support with documentation like stability reports and product information files for UK cosmetics regulations, though brands must verify final compliance.
• Stability testing includes accelerated conditions (e.g., 40°C/75% RH) to predict 12-month shelf life, and we audit raw material suppliers for purity to prevent odor shifts.