Federal FDA requires stability testing, preservative efficacy, and safety substantiation before market. Most brands also conduct microbial and stability testing (3–6 months minimum). State requirements vary: California mandates Prop 65 compliance, New York bans specific ingredients, and some states require allergen disclosures. AJ Cosmo Labs connects you with vetted labs that know state-by-state rules.
Read the full guide on cosmetic product testing requirements by state →