Evidence Library & Verification Ledger
See which sources NutraFavorites trusts, what each source can establish and where product-level verification still remains incomplete.
Research about an ingredient, form, outcome and population.
What the current manufacturer label declares about this exact formula.
Testing, identity, lot, freshness, price and merchant records for the finished product.
Physical observations that can be reported only after obtaining the exact product.
Core sources and their proper role
NIH Office of Dietary Supplements
Evidence-based nutrient and ingredient fact sheets for health professionals.
Open source ↗FDA Daily Value reference
Current U.S. labeling references used to calculate Percent Daily Value.
Open source ↗FDA claim substantiation guidance
Framework for the meaning, relevance, quality and totality of evidence behind supplement claims.
Open source ↗FTC Health Products Compliance Guidance
Standards for truthful health marketing and competent, reliable scientific evidence.
Open source ↗NIH NCCIH
Safety and evidence context for complementary-health ingredients and interventions.
Open source ↗PubMed
Bibliographic record used to inspect peer-reviewed human research and systematic reviews.
Open source ↗How we earn authority without pretending to test products
- Every material health or label statement should link to an authoritative source or a clearly identified study.
- Ingredient research never transfers automatically to a finished product or marketing claim.
- Study design, population, outcome, amount, form, duration, sponsor and limitations remain attached to the conclusion.
- “Clinically studied ingredient” is not treated as “this product was clinically tested.”
- Unknown testing, manufacturing or formula fields remain unknown instead of being converted into trust.
What comes next when products arrive
The product record can add package photography, lot and expiration identifiers, seal and serving observations, label-to-listing consistency, taste or usability notes where relevant, and traceable laboratory or certification records. Those observations will be dated and will not substitute for clinical evidence.
Ledger reviewed: September 1, 2026. Regulatory and scientific sources are rechecked when a page is materially updated.