Simple rinse-off products like body washes or shampoos can reach a stable prototype in 8 to 10 weeks. Leave-on products such as serums or moisturizers typically take 12 to 16 weeks once stability testing is included. SPF or OTC drug products require 16 to 24 weeks minimum. AJ Cosmo Labs helps founders find chemists who are transparent about their timeline before any money changes hands.
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