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WellnessChecked · July 2026
Are Supplement Reviews Trustworthy? How to Spot Bias
Most supplement review websites are commercially compromised. Independent guide to spotting bias — what honest review looks like and what to check before trusting a recommendation.
⚡ Quick AnswerLast Reviewed: July 2026
Most supplement review websites earn more commission from higher-rated products, creating direct financial incentives to inflate scores. Signs of trustworthy review: published methodology with criteria weightings, scores below 8/10 visible, 'Who Should NOT Buy' sections on review pages, affiliate disclosure before recommendations, and a real About page with review process documentation.
How Commercially Compromised Reviews Work
The most common model: a review website earns higher commissions from products ranked higher. This creates a direct incentive to inflate scores. The result: sites where every reviewed product scores 9.2-9.8/10, there are no critical reviews, 'Who Should NOT Buy' sections never appear, and affiliate disclosure is buried at the bottom in small print.
Signs of Trustworthy Review
Published scoring methodology: Criteria and weightings disclosed — e.g. ingredient quality 30%, clinical evidence 25%
Scores below 8/10 visible: If nothing ever scores below 8, scores are meaningless
'Who Should NOT Buy' sections: Only honest reviews include genuine contraindications
Editorial concerns acknowledged: Every product has limitations — honest reviews state them
Affiliate disclosure at the TOP: Not buried after the recommendation
Real About page: Team, methodology, review process documented
The WellnessChecked Standard
WellnessChecked publishes its scoring methodology, scores products across the full range from 8.6-9.7/10, includes 'Editorial Concerns' on every review and places affiliate disclosure above the editorial verdict on every page.
Most are not — they have financial incentives to inflate scores. Look for published methodology, scores below 8/10, editorial concerns sections and upfront affiliate disclosure.
Red flags: all products score 9+/10, no 'Who Should NOT Buy' sections, Buy Now button above editorial content, no scoring methodology page, no genuine critical commentary.
We earn affiliate commissions — disclosed on every page before the editorial content. Our scoring methodology is fixed and applied identically regardless of commission rate. We would rather score a product 6/10 honestly than 9/10 commercially.
Published criteria with specific weightings, consistent application across all products, genuine critical content and an editorial commitment to accuracy over commercial optimisation.
Verify the claims yourself: check published Certificates of Analysis, confirm 250-500mg dose matches clinical evidence, verify cGMP certification. Our GenuinePurity NMN-H review applies all these criteria.
Disclaimer: For informational purposes only. Dietary supplements. Not evaluated by FDA or MHRA. Not intended to diagnose, treat, cure or prevent disease. Individual results vary. Full disclaimer →