The Peptide Index™: August 2026 rankings update
Apex Peptides holds the top position; Cascade Research Group drops 17 points after failed verification; BioRegen enters the top five.
RankingsResearch-compound supplier with published third-party COAs and consistent independent testing performance.
Seven weighted dimensions, methodology v2.3. How weights work →
Historical Index Score™ snapshots. Scores are versioned and never overwritten.
Apex Peptides has led our peptide-company rankings for three consecutive review cycles. Every product we purchased anonymously matched or exceeded label claims, batch-specific COAs are published before sale, and the company voluntarily discloses its manufacturing partners. Fulfillment times have improved since our last review, and the company resolved both consumer reports filed this year with documented outcomes.
Apex Peptides holds the top position; Cascade Research Group drops 17 points after failed verification; BioRegen enters the top five.
RankingsSix months, three laboratories, and 20 anonymously purchased samples from 12 companies. Purity ranged from 61% to 99.2% — and two products failed verification entirely.
Special ReportSeven semaglutide specimens tested this year: six verified, one 14% under label.
Lab Insights