How FactoWiki Reviews Products
FactoWiki publishes desk-based buying reviews, comparisons and Best Supplements guides. We distinguish product descriptions, ingredient research, safety questions and purchasing terms, and we say what we could not verify.
1. Identify the exact product
Check the brand, format, seller and current label. Similar names or changing formulations can make two descriptions refer to different products. If the complete panel is unavailable, the review says so.
2. Separate claims from evidence
A seller’s claim is not a measured result. A study of an ingredient does not establish that a product containing it works at a different dose or in a different combination. Finished-product testing must be identified as such.
3. Explain safety limits
Discuss the cautions relevant to the formula and category, including medication and allergy questions. This is not a personalised safety clearance.
4. Compare the real purchase
Use total delivered cost, labelled servings, package size, recurring billing and current return conditions. A larger bundle’s lower unit price does not automatically make it better value.
How Best Supplements guides are assembled
Best Supplements guides compare products FactoWiki has already reviewed in a category. Each product is assessed on the same criteria, in this order of weight:
- Quality of human evidence behind the main ingredients — systematic reviews and randomised trials count for more than single small studies; animal or mechanism data count for nothing on outcomes.
- Dose disclosure and meaningful doses — whether the ingredients with evidence are listed with amounts, and whether those amounts are near the doses studied.
- Formula transparency — one consistent, published Supplement Facts panel versus proprietary blends, missing amounts or conflicting formulas from different sellers.
- Safety and interactions — ingredients with meaningful drug interactions, undisclosed stimulants, or cautions for common medications.
- Category relevance — whether the formula is built for the stated purpose or borrows a different category's ingredients.
- Marketing claims — unsupported mechanisms, disease claims or “clinically proven” language about a finished product count against it.
- Price, value and refund terms — considered last, because a long guarantee does not add evidence.
Products are grouped by how they perform on these criteria, not ranked by commission. When no product in a category has a transparent, well-dosed formula, the guide says so and explains what a better-constructed alternative would look like. Best Supplements guides and comparison pages do not carry affiliate purchase links.
Why the main-site reviews use qualitative assessments
Earlier numerical ratings did not have a documented, reproducible calculation. They were removed. The current assessment describes evidence, label transparency, safety limitations and price considerations without false numerical precision. There is no customer-review average unless the underlying reviews can be verified.
What we have not done
A buying guide does not mean we purchased, used, laboratory-tested or clinically tested the product. No named clinician is credited as the medical reviewer of FactoWiki product guides. AI tools may assist drafting and editing, but do not supply medical validation.
Responsibility and corrections
Product guides are published by the FactoWiki Editorial Team; ingredient evidence is prepared by the FactoWiki Research Team. Read the editorial policy or send a correction when a claim, label or price needs attention.