Our 5-Pillar Supplement Evaluation Methodology

VigorScienceLab classifies every product into a documented Editorial Evidence Tier (Tier 1, Tier 2, or Tier 3) and evaluates it across five qualitative criteria:

Pillar 1: Published Evidence Tier

Formulations evaluated in randomized, double-blind, placebo-controlled human trials on the finished commercial product (VigRX Plus®, Semenax®, GenF20 Plus®) provide the strongest type of evidence, followed by products using clinically dosed branded extracts (Testosil®, Erectin®), and finally traditional herbal blends (ExtenZe®).

Pillar 2: Formula Transparency & Standardization

We look for Supplement Facts labels that disclose exact milligram quantities and standardization ratios for each active botanical or amino acid. Proprietary blends with undisclosed ingredient amounts limit what we can verify.

Pillar 3: Bioavailability & Delivery Architecture

Because raw botanical powders and amino acids suffer from gastric acid degradation and hepatic glucuronidation, we evaluate whether a product incorporates patented absorption enhancers (BioPerine®, AstraGin®) or enteric-coated tablets/softgels.

Pillar 4: Stimulant & Cardiovascular Safety Profile

Yohimbe-free, hormone-free formulations suitable for daily use by healthy men over 40 are distinguished from blends containing yohimbine alkaloids or DHEA in our safety assessment.

Pillar 5: Per-Serving Value & Refund Guarantee

We calculate exact daily serving costs across 1-month, 3-month, and 6-month bundles and verify whether the manufacturer provides at least a 60-day money-back guarantee (all six core products offer a 67-day guarantee).