ConsumerLab vs NSF vs USP: Read the Actual Testing Record
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ConsumerLab, NSF and USP offer different ways to examine product quality. Identify the particular service or program before deciding what a result or seal establishes.
ConsumerLab has reviews and a certification program
ConsumerLab operates a manufacturer-paid Quality Certification Program as well as its product reviews. Products that pass that program can qualify for its seal under a license agreement. It says test samples are not accepted directly from manufacturers. This is a product program, not a blanket approval of an entire brand. Read ConsumerLab’s own program description.
When using a ConsumerLab result, identify whether it is from a product review or the certification program, the exact tested product and the report date. Do not assume a similarly named formulation or later lot was part of the same test. This guide does not reproduce subscription-only results.
NSF: keep the program name visible
NSF/ANSI 173 product certification and NSF Certified for Sport are separate records; the Sport program adds prohibited-substance screening. Follow the matching directory and exact product scope. See NSF’s explanation.
USP: a product verification mark
USP’s program addresses declared ingredients and amounts, specified contaminants, product breakdown and manufacturing criteria. Check the exact product carrying the mark. Read USP’s verification summary.
A worksheet for any test or seal
- Identity: product name, formulation, flavor and region.
- Scope: substances, label claims or standards actually checked.
- Sample: lot or batch where provided, and whether a finished product was tested.
- Date and status: when the observation was made and whether the listing remains current.
- Source: the original report or program entry rather than a retailer’s paraphrase.
A certification or test may support a narrow quality claim without establishing a medical benefit. A product absent from one program may have other evidence. Neither conclusion should be inferred from the presence or absence of a familiar logo alone.
How SupplementChecker uses these records
Our current scoring method supports a defined set of reviewed programs. It does not treat an unsupported program or a missing review as a failed test. See the evidence method, program comparison and brand lookup.
Guide text updated 2026-09-08. Individual evidence records have their own review dates. Read the evidence method.
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