How We Review Supplements
Every review on SuppTop follows the same transparent process. We believe the supplement industry has a trust problem — exaggerated claims, mystery blends, and fake reviews. Our job is to cut through that. Here’s exactly how we do it.
Our 5-Point Rating System
Every product we review is scored 1-10 on the same five criteria, so you can compare any two products in a category fairly:
- Scientific Evidence — How well do published human studies support the product’s main benefit claim? We prioritize randomized controlled trials and meta-analyses over animal studies and marketing.
- Ingredient Quality — Are the active ingredients present at clinically studied doses? Is the formula clean (no proprietary blends, no unnecessary fillers)?
- Third-Party Testing — Is the product independently tested (NSF, USP, IFOS, Informed Choice) or does the brand publish lab results? This matters because independent testing found many supplements don’t contain what the label claims.
- Value — Price per effective serving, not price per bottle. A $50 bottle that lasts 3 months can be cheaper than a $25 bottle that lasts 3 weeks.
- Real-World Experience — Taste, mixability, aftertaste, digestion, and consistency based on verified user feedback across thousands of reviews.
Evidence Grades
For each product’s main claim, we assign an evidence grade:
| Grade | Meaning | Example |
|---|---|---|
| Strong | Multiple human trials and/or meta-analyses support the effect at the studied dose. | Creatine for muscle strength; omega-3 EPA/DHA for triglycerides. |
| Moderate | Some human trials support the effect, but results are mixed or doses vary. | Probiotics for general digestive comfort; melatonin for jet lag. |
| Limited | Preliminary or inconsistent evidence; effects may be placebo-level. | Most “immune support” herb blends; collagen for skin. |
| Unsupported | No quality human evidence for the claim. We say so plainly. | “Fat-burning” claims tied to proprietary blends. |
What We Do (and Don’t Do)
- We do: read the actual studies, check doses against clinical research, verify third-party testing, and test products when we can.
- We do: tell you when a product’s claims are not supported by evidence — even if it’s a popular, well-marketed product.
- We don’t: accept payment for positive reviews. We do earn affiliate commissions when you buy through our links — this is disclosed on every page and never influences ratings.
- We don’t: exaggerate benefits or use “cure-all” language. Supplements are not medicines. If a product can’t back up its claims, we say so.
- We don’t: review every product. We focus on popular categories where consumers are most likely to waste money on bad products.
Editorial Independence & Funding
SuppTop is reader-supported: we earn commissions from affiliate links (Amazon, brand stores, and retailers) at no extra cost to you. This funding model keeps our reviews free to read. It does not influence our ratings — our rankings are based on evidence, ingredient quality, testing, value, and experience, in that order. Brands cannot buy a better score.
Medical Disclaimer
SuppTop content is for informational purposes only and is not medical advice. Supplements can interact with medications and conditions. Always consult a qualified healthcare provider before starting any supplement, especially if you are pregnant, nursing, taking medication, or managing a health condition. Never use supplements to replace prescribed treatment.
Updates
Supplement research moves quickly. We review our published articles periodically and update ratings, doses and conclusions when new human trials, meta-analyses or product changes warrant it. The “last updated” date is shown at the top of every article, so you can see how current our assessment is.
Corrections
If we publish something inaccurate, we correct it as soon as we are aware of it and note the change on the article. Readers who spot an error are welcome to contact us directly — corrections are the fastest way to keep this site trustworthy.
Limitations
Our reviews are educational, not medical advice. We do not test products in a laboratory, and we do not claim to have tried every product on the market. Evidence can change, individual responses vary, and a product that suits one person may not suit another. When the evidence is mixed or insufficient, we say so plainly rather than forcing a conclusion.