Discover a practical checklist to evaluate supplement quality: safety, potency, and trusted brands. Make informed choices and avoid low-quality products. On this page, the focus is the quality assessment of supplements as a disciplined process: using documented criteria and verifiable information rather than marketing messages. Quality assessment of supplements begins with labeling and manufacturing details. Check that the ingredient list matches what’s in the product, and look for clear allergen disclosures, declared amounts, and any warnings. Note the manufacturer’s name and contact information, as well as the lot or batch number, expiration date, and storage recommendations. Confirm that the product is produced in a facility that follows good manufacturing practices (GMP) and that the brand provides documentation, such as a certificate of analysis (COA) from an independent laboratory for each batch. Potency and consistency are central to a rigorous quality assessment of supplements. Seek third-party testing results and batch-specific COAs that confirm ingredient concentrations and labeling accuracy. Look for testing on potential contaminants, such as heavy metals or pesticides, where available, and review how the results are communicated. A transparent, well-documented process for sourcing, testing, and reporting helps ensure that potency information stays consistent across lots. Trusted brands demonstrate transparency and accountability. Evaluate a brand’s track record, recall history, and supply-chain transparency. Prefer suppliers that publish testing results, offer easy access to COAs, and provide clear contact support and return policies. Consider purchasing through official channels or reputable retailers that emphasize quality controls. By applying these steps, you can conduct a thorough quality assessment of supplements and avoid low-quality products.