Key stability measures include formulating at pH 4.5–7.0, avoiding high-heat processing, selecting compatible preservative systems, using antioxidant co-actives such as tocopherol or ferulic acid, filling into airless pump or nitrogen-blanketed containers, and storing finished goods below 25°C. Accelerated stability testing at 40°C/75% RH over 12 weeks is the industry standard. A cosmetic chemist sourced through AJ Cosmo Labs will design a full stability protocol from day one.
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