Supplement verification is the practice of confirming that a product’s ingredients, contents, and labeling match what is advertised. To help you verify supplements you can truly trust, focus on four pillars: independent testing, trusted certifications, label checks, and red flags to watch for. This page walks through practical steps you can use to perform supplement verification without making or implying health claims. Independent testing involves third-party laboratories analyzing the product’s ingredients and checking for contaminants or adulterants. When you see a current Certificate of Analysis (COA) or lab report tied to the specific batch, that’s a key signal in supplement verification. Reputable programs include seals from USP, NSF International, and other accredited labs; look for accreditation statements such as ISO 17025 on the certs. If a COA isn’t readily available, consider requesting it from the company before purchasing as part of your supplement verification process. Trusted certifications and clean labeling contribute to robust supplement verification. Certification seals indicate the product has undergone independent testing under defined standards. On the label, verify that ingredients are listed clearly, serving size is stated, and there is a lot/batch number and expiration date. Check for allergen declarations and a clear contact method for the manufacturer, and compare the listed ingredients to the COA. Beware of vague substitutions or proprietary blends that withhold the exact amounts, which can complicate supplement verification. Red flags to flag during supplement verification include missing contact information, missing or outdated COAs, inconsistent ingredient lists across packaging, or claims that cannot be substantiated by independent tests. Also be wary of unusually low prices or marketing language that implies guaranteed results. If any red flags appear, pause the purchase and seek additional verification from the manufacturer or a trusted third party. Taking these steps supports thorough supplement verification and helps you make informed choices.