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.
RankingsCascade Research Group
Failed our most recent purity test; currently under active review.
This company is under active review. See the testing history below.
Tests2
Score updatedJul 2, 2026
Methodologyv2.3
Movement -17down 17 points
Score Breakdown
Seven weighted dimensions, methodology v2.3. How weights work →
- Testing & Quality 25% 22
- Transparency 18% 38
- Manufacturing & Sourcing 15% 40
- Customer Experience 12% 54
- Shipping & Fulfillment 12% 62
- Policies & Returns 8% 44
- Community Feedback 10% 38
Score History
Historical Index Score™ snapshots. Scores are versioned and never overwritten.
Editorial Assessment
Cascade Research Group failed independent testing in June 2026: a product labeled as BPC-157 measured 61% purity with significant unidentified impurities. The company disputed the result; a second sample from a different lot confirmed the finding. Cascade is flagged under active review and we advise strong caution.
- Shipping & fulfillment
- Standard dispatch.
- Policies & returns
- No responses received to resolution inquiries.
- Testing record
- 2 independent tests. Both failed purity verification.
Independent Testing History
Testing databaseRelated Reporting
We Independently Tested 20 Peptide Samples. Here’s What We Found.
Six 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 Report
Why we publish failed tests — and what happens after we do
Disputes, retests, legal letters, and score consequences: the afterlife of a failed verification.
TransparencyCommunity Discussions
Forum 87 replies