EvidenceFirst Health
Clinical · Evidence-Led · Independent

Supplement reviews, evaluated against the published research.

We score probiotics and microbiome products against a published rubric: strain quality, CFU delivery, clinical backing, and value. No sponsorships. No marketing copy. Just what the evidence says.

Products evaluated
Test days logged
Studies referenced
Brand sponsorships
Featured Review · June 2026
RANKED #1
Women's Probiotic
O Positiv

We evaluated 14 women's probiotics across four pillars: strain survivability, multi-system targeting, clinical backing, and per-day cost. Only one product met all four criteria.

→ 14 brands tested → 6-month review window → 42 studies referenced
Read the Full Analysis →
Coverage Areas

Categories where supplement quality varies widely and the published research is robust enough to score against.

Methodology

Most supplement review sites are thinly disguised affiliate funnels: ranked by commission rate, written by people who haven't read a clinical paper since college.

We do it differently. Every product is scored against the same six-criterion rubric, weighted transparently, with every study citation listed. We publish our methodology, our scoring, and our editorial standards.

→ Read full methodology

We evaluate the specific Lactobacillus / Bifidobacterium strains in each product against published trial outcomes, not the generic genus claims printed on marketing pages.

CFU on the label is meaningless if the strains don't survive stomach acid. We weight products that publish CFU at expiration and use acid-resistant delivery.

Each review includes the number of peer-reviewed studies underlying the recommended product's specific strain selection.

We purchase every product at retail. We have never accepted payment from a brand for placement or favorable coverage.

Latest Review

A six-month evaluation of 14 women's probiotics, strain-by-strain, study-by-study, with one clear winner.

Read the Review →