How to formulate a stable Vitamin-C serum

Choosing the right ascorbic-acid derivative, pH window, chelators and packaging to deliver a 12-month stable serum.

This article is part of our formulation guides. The full reference formulation with INCI, TDS and COA is available to registered partners — request access below.

Key takeaways

• Start with a clear positioning brief
• Pick an INCI-friendly active system first
• Validate stability before scaling
• Document compliance from day one

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