Data sources

NutraTested draws from the following primary and public sources. We do not scrape competitor databases.

Supplement evidence

Human research evidence is sourced from PubMed/PMC. Every cited study links to its PubMed record.

Certifications and lab tests

Certification data is harvested from the public registries of NSF International, Informed Sport, USP, and IFOS. Published analytical tests (e.g., HPLC label-claim studies) are sourced from verifiable published reports, each attributed to the party that conducted the test.

Expert stacks

Expert-stack information is aggregated from each expert's own primary public sources (their sites, podcast show notes, published protocols). We do not copy their prose; we record the stated supplement, dose, and rationale and link to their primary source.

What we never do

We never scrape proprietary databases, research-chemical vendors, or gray-market supplement sources. We do not reproduce paywalled study content.