Last Updated: September 27, 2025
At HealthSupplementsLab.com, our goal is to evaluate dietary supplements using a transparent, research-led framework. This page explains exactly how we collect data, grade evidence, calculate scores, and keep content current.
1) Scope & Philosophy
We review supplements through an evidence-first lens. Our process blends literature review, label analysis, safety screening, brand due diligence, and value assessment. We do not conduct clinical trials or claim lab certification unless explicitly stated.
2) Data Sources
- Primary literature: PubMed-indexed RCTs, meta-analyses, systematic reviews.
- Authoritative references: Mayo Clinic, Cleveland Clinic, MedlinePlus, NIH/ODS, FDA guidance.
- Manufacturer materials: labels, COAs (if available), quality statements and certifications.
- Market signals: recall history, customer service reputation, and verified-purchase feedback (contextual only).
3) Evidence Grading (Ingredient-Level)
We grade the evidence base for each primary ingredient using a 5-tier scale:
- Grade A: Multiple high-quality RCTs/meta-analyses show consistent benefit for the target outcome.
- Grade B: At least one solid RCT or several cohort studies show likely benefit; more data desirable.
- Grade C: Mixed/limited findings; preliminary or small-sample studies.
- Grade D: Weak or negative evidence; benefit unlikely for stated outcome.
- Insufficient: Inadequate evidence to evaluate.
4) Scoring Rubric (Product-Level)
Our overall score (0–100) is a weighted composite across seven dimensions. We publish these weights for transparency.
| Dimension | What We Assess | Weight |
|---|---|---|
| Evidence Match | How well the formula aligns with research-backed ingredients & dosages for the claimed benefits. | 30% |
| Dosage Integrity | Are key actives dosed within research-supported ranges? Are blends transparent vs. proprietary? | 15% |
| Safety & Tolerability | Contraindications, common side effects, stimulant load, allergen disclosures, and interaction risks. | 15% |
| Quality & Transparency | COAs (if available), third-party testing, GMP statements, clear labeling, source transparency. | 12% |
| Brand Trust | Recall history, customer service track record, company disclosures, years in market. | 10% |
| Value for Money | Price per serving relative to formula strength, research alignment, and competitor landscape. | 10% |
| User Experience | Capsule size/count, taste/odor for oils/powders, dosing convenience, money-back guarantees. | 8% |
Note: We do not include affiliate status in scoring. Sponsored content is separately disclosed and never alters rubric outcomes.
5) Calculation Model
Each dimension receives a subscore on a 0–10 scale, converted to a weighted contribution. The final score = Σ(weight × subscore × 10). We round to the nearest whole number (0–100). Example:
Final Score = (Evidence Match 8.5×0.30×10) + (Dosage 7.5×0.15×10) + ... = 86/100
6) Safety Screen
- We flag common interactions (e.g., anticoagulants with high-dose omega-3) and typical side effects, citing reputable sources.
- We encourage readers to consult licensed professionals for personal medical decisions.
7) Brand Due Diligence
- We look for third-party testing (NSF/USP/ISO or COA links), GMP statements, and transparent labeling.
- We check for recent recalls or regulatory warnings (when publicly documented).
8) Updates & Corrections
- Scheduled reviews: high-traffic or medical-sensitivity pages are re-checked at least every 6–12 months.
- Trigger updates: formula changes, new studies, product recalls, or pricing shifts.
- Material changes receive an “Editor’s Note” with date/time stamp.
9) Conflicts of Interest
Contributors must disclose financial ties to brands covered. We decline assignments where conflicts cannot be mitigated. Gifts that could bias coverage are not accepted. Samples (if any) are disclosed in-article.
10) AI-Assisted Workflows
We may use AI tools for drafting, summarization, and consistency checks. Human editors perform fact-checking, medical-source verification, and compliance review before publication.
11) Disclosure & Compliance
Affiliate relationships are disclosed per FTC guidance. See our Advertising & Affiliate Disclosure and Editorial Policy. Content is informational, not medical advice (see Disclaimer).
12) Contact
Questions about our methodology? Reach us at [email protected].