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Sources & References

Last updated: November 2026

About this list: These are the general kinds of sources we use to check claims about wellness products, with links to official reference sites. Listing a source here does not mean it endorses this Site or any product. References for a specific claim or study appear on the page that makes it.

1. How we use sources

Our method is described on the Methodology page. In short, we separate three things: what a seller says (the seller’s own pages), what research shows (published studies and reviews), and what regulators and health agencies say (official guidance). We try to name the source of each claim and say when we cannot find support for it.

2. Research and evidence databases

PubMedIndex of biomedical research papers, run by the U.S. National Library of Medicine. Used to find studies on ingredients and health topics.
Cochrane LibrarySystematic reviews that combine the results of many studies. Used to judge the overall strength of evidence.
ClinicalTrials.govRegistry of clinical studies. Used to check whether human trials exist and what they tested.

3. Health and supplement information from public agencies

NIH Office of Dietary SupplementsFact sheets on vitamins, minerals and other supplement ingredients, including safety information.
NIH National Center for Complementary and Integrative HealthEvidence-based information on herbs, botanicals and other supplements.
MedlinePlusPlain-language health information from the U.S. National Library of Medicine, including drug and supplement interactions.
U.S. Food and Drug Administration: Dietary SupplementsHow supplements are regulated, labeling rules, safety alerts and tainted-product warnings.

4. Advertising and claims rules

Federal Trade Commission: Health Products Compliance GuidanceRules about how health and supplement claims must be supported. Used to flag claims that need strong evidence.
Federal Trade Commission: Disclosures 101Guidance on how to disclose affiliate relationships clearly. Used for our Affiliate Disclosure.

5. Seller information

We read each seller’s official website, checkout page, label and policies. These show what the seller claims, but they are not independent evidence, and we label them as seller statements. For any current price, guarantee or ingredient list, the seller’s own page is the final authority, and it can change.

6. References for specific pages

When a page on this Site cites a study or an official statement, we list the full reference at the bottom of that page, with the authors or organization, title, publication and year, and a link where one is available. This list will grow as we publish more pages.

7. Spotted an error or a better source?

Tell us at info@thedailysmartinfo.com. We review corrections promptly. See our Editorial Policy.