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• About USP
• USP–NF
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• USP Verified
  • USP Verified Dietary Supplements
    • Participating companies
    • Verified supplements
    • Verification process
    • Participant manual and education resources
    • Join the program
    • Frequently asked questions
  • USP Verified Dietary Supplement Ingredients
  • USP Verified Pharmaceutical Ingredients
• Pharmacopeial Education
• USP in Developing Countries
• Meetings
• Products

How USP Verifies Dietary Supplements

USP conducts a rigorous process of tests and reviews before awarding the USP Verified Mark to a dietary supplement that a manufacturer voluntarily submits for verification. The process includes the following steps:

• Experienced USP scientists test supplement products to ensure that they meet USP standards for quality, purity, and potency.
• USP audits the supplement manufacturer's facilities, practices, records, and quality control measures.
• USP tests marketplace samples of verified products to ensure that they continue to retain ingredient strength and stability over their shelf life.
• USP reviews supplement labels to ensure that the ingredients are properly listed and that appropriate dosage information and warnings/cautions/counterindications are featured.