A fully custom tranexamic acid serum typically takes 12–24 weeks from initial brief to first sellable batch. This includes formula development and iterations (4–8 weeks), accelerated stability testing at 40 °C over 8–12 weeks, micro challenge testing, and regulatory label review. Stock-formula private labeling can compress this to 4–8 weeks. Post your brief on the AJ Cosmo Labs app to get realistic timelines from active manufacturers.
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