How We Evaluate Supplements
Our 7-step methodology ensures every recommendation is grounded in clinical evidence, not marketing claims. Full transparency in how we research, test, and rank.
peer-reviewed studies analyzed across 8 longevity supplement categories. Every product purchased independently. Every ingredient verified against clinical research. No free samples. No sponsored placements. No exceptions.
Our 7-Step Evaluation Process
Every supplement featured on AgePrime undergoes a rigorous, multi-step evaluation before receiving a recommendation. This process was developed by Dr. James Chen, PhD, and reflects the same standards of evidence used in academic research.
Step 1: Literature Review
We begin every evaluation with a comprehensive review of the published clinical literature. We search PubMed, ClinicalTrials.gov, and leading journals (Nature, Science, Cell, JAMA) for human clinical trials on the active compound. We prioritize randomized, double-blind, placebo-controlled studies and meta-analyses. Animal and in-vitro studies are noted but weighted significantly lower.
Step 2: Ingredient Analysis
We evaluate the specific ingredient forms used in each product. For example, ubiquinol vs. ubiquinone in CoQ10, or trans-resveratrol vs. cis-resveratrol. We assess bioavailability, stability, dosing relative to clinical evidence, and the presence of absorption-enhancing compounds like piperine or liposomal delivery. Proprietary blends that hide individual ingredient doses receive penalties.
Step 3: Third-Party Testing Verification
We verify independent testing certifications from NSF International, USP, ConsumerLab, Eurofins, and ISO-accredited laboratories. We check for heavy metal testing, microbial contamination screening, and label accuracy verification. Products without verifiable third-party testing are flagged and penalized in our scoring system.
Step 4: Expert Panel Review
Every product evaluation is reviewed by our expert panel: Dr. James Chen (PhD, Molecular Biology), Dr. Sarah Park (PharmD), and Dr. Rachel Liu (RD, CNS). The panel assesses ingredient quality, dosing adequacy, safety considerations, drug interaction potential, and whether marketing claims are supported by the clinical evidence.
Step 5: User Testing Protocol
Each product is purchased at retail price and used by a team member for a minimum of 30 days. We assess practical factors: capsule size, taste (if applicable), digestive tolerance, packaging quality, and consistency across batches. This step ensures our recommendations reflect the real-world user experience, not just laboratory data.
Step 6: Price-Per-Dose Analysis
We calculate the true cost per clinically effective dose for every product. This accounts for differences in serving sizes, capsule counts, and dosing recommendations. A product that requires four capsules to reach the clinical dose at $40 per bottle is not the same value as one that delivers the same dose in one capsule at $30. We also track price history to flag temporary promotions.
Step 7: Final Composite Rating
Products receive a final score based on weighted criteria: Clinical Evidence (30%), Ingredient Quality (25%), Third-Party Testing (20%), Value (15%), and User Experience (10%). Rankings are determined by composite score. Ties are broken by strength of third-party testing. All scores are reviewed quarterly and updated when new research, formulations, or pricing changes occur.
What We Evaluate
Clinical Evidence (30%)
The strength and quality of the published clinical research supporting the active compound. Human randomized controlled trials carry the most weight. Animal studies and in-vitro research are noted but do not drive rankings.
Ingredient Quality (25%)
The specific forms of ingredients used, their bioavailability, dose relative to clinical evidence, and the absence of unnecessary fillers. Standardized extracts and clinically validated forms score highest.
Third-Party Testing (20%)
Independent verification of label accuracy, purity, and the absence of contaminants. NSF, USP, and ConsumerLab certifications carry the most weight. Certificates of analysis from ISO-accredited labs are also accepted.
Value & Experience (25%)
Price per clinically effective dose, not just per serving. User experience factors including capsule size, digestive tolerance, packaging, and batch consistency. Brand transparency and customer service also contribute to this score.
Our Independence
AgePrime never accepts free products, sponsored placements, or payment in exchange for reviews. Our affiliate relationships do not influence rankings. If a product has strong clinical evidence behind it, we recommend it regardless of whether we earn a commission. If a product lacks evidence, we say so regardless of its popularity.
Every member of our research team discloses their credentials, institutional affiliations, and methodology. We believe the longevity supplement space needs more honest, evidence-based voices — and that standard begins with full transparency about how we work and how we are funded.
Important: Our reviews are for informational purposes only and do not constitute medical advice. Longevity supplements may interact with medications and are not appropriate for everyone. Always consult a qualified healthcare professional before starting any supplement regimen, particularly if you have pre-existing health conditions or take prescription medications.
Questions about our evaluation process? Contact us at hello@ageprime.com.
See Our Research in Action
Explore our evidence-based longevity supplement reviews across 8 categories.
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