Accelerated stability testing for a cosmetic formula typically takes 8–12 weeks at 40 °C / 75% RH to simulate a two-year shelf life. Real-time studies at 25 °C run in parallel for 12–24 months. Most cosmetic chemists recommend starting both simultaneously so you can launch using accelerated data. You can find labs experienced in both protocols by posting a brief on the AJ Cosmo Labs iOS app.
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