Lab Credibility
25 pts- 3rd-Party · Independently Verifiable: 25
- 3rd-Party · Unverified Portal: 15
- In-House / Manufacturer: 5
- Unverified / No COA: 0
Lab Audit Index
Vendor rankings & methodology
Each vendor's score is the average of its current batch scores, and every point traces to a line on a certificate of analysis. Letter grades follow a fixed rubric; the rank shows where each vendor stands among everyone we audit.
| # | Vendor | Batches | Avg purity | Verifiable | Latest test | Grade |
|---|---|---|---|---|---|---|
| 1 | Simple Peptide No Trustpilot ratingTop 10% | 17 | 99.76% | 100% | Oct 22, 2026 | A-71/100 |
| 1 | NG Peptide No Trustpilot ratingTop 10% | 12 | 99.60% | 0% | Sep 18, 2026 | A-71/100 |
| 3 | Better Peptide No Trustpilot ratingTop 25% | 16 | 99.80% | 100% | Oct 20, 2026 | B69/100 |
| 4 | My Pure Peptide 4.7TrustpilotTop 50% | 15 | 99.50% | 100% | Aug 24, 2026 | B68/100 |
| 5 | Swiss Chems No Trustpilot ratingTop 50% | 7 | 99.47% | 100% | Sep 13, 2026 | B65/100 |
| 5 | Go Alpha Labs No Trustpilot ratingTop 50% | 6 | 99.42% | 83% | Sep 26, 2026 | B65/100 |
| 7 | Northline Labs 4.2TrustpilotTop 50% | 16 | 99.44% | 0% | Oct 5, 2026 | C57/100 |
| 8 | Peptide Partners No Trustpilot ratingLower half | 2 | 99.80% | 0% | Sep 3, 2026 | C56/100 |
| 9 | PeptidePro 4.7TrustpilotLower half | 12 | 99.59% | 0% | Jun 11, 2026 | C55/100 |
| 10 | EZ Peptides No Trustpilot ratingLower half | 4 | 99.58% | 100% | Jul 2, 2026 | C54/100 |
| 11 | BioLongevity Labs No Trustpilot ratingLower half | 9 | 99.75% | 0% | Oct 7, 2026 | C52/100 |
| 12 | Chimera Peptides 1.9TrustpilotLower half | 6 | 99.68% | 17% | Feb 18, 2026 | C51/100 |
| 13 | Research Purpose Labs 3.4TrustpilotLower half | 10 | 99.54% | 0% | Jul 27, 2026 | D46/100 |
| 14 | Aavant Peptides No Trustpilot ratingLower half | 2 | 99.91% | 0% | Mar 24, 2026 | D42/100 |
Composite Audit Score (0–100)
Purity & Quantity Assay
25 pts- HPLC purity ≥ 99.0%: 15 · ≥ 98%: 10 · ≥ 95%: 5
- Measured mg within ±5% of label: 10 · ±10%: 6 · ±20%: 2
Safety Screening
15 pts- Heavy metals panel (Pb, As, Cd, Hg) pass: 9
- Endotoxin (LAL) pass: 6
- Any failed panel caps the total at 59 (grade C)
Batch Recency
15 pts- Tested ≤ 60 days ago: 15
- 61–90 days: 10 · 91–180 days: 5
- Over 6 months: 0 (stale COA)
Value ($/mg)
10 pts- Effective $/mg = price ÷ measured mg
- Compared with a fixed $/mg benchmark per compound (set once from the market median), so other vendors' prices never move a grade
- ≤ 85% of benchmark: 10 · ≤ benchmark: 8 · ≤ 115%: 5 · above: 2
Community Signal
10 pts- Trustpilot rating (0–5) scaled to 7
- Verified community test reports, up to 3 (40+ reports = full)
Objective grade + cohort rank
The letter grade is fixed. It comes straight from the 0–100 score on the bands below, so a vendor's grade only changes when its own lab reports change or get older, never because another vendor got better or worse. Any failed safety panel caps the grade at C.
The rank is relative. Each active vendor is also ranked against everyone we audit, for example
#1 of 14 audited vendorsTop 10%
The percentile badges are Top 10%, Top 25%, Top 50% and Lower half. Tied scores share a rank, and the rank never changes the letter.
- A+Gold standard90+ points, plus endotoxin-tested every batch, every COA under 90 days, independently verifiable lab, ≥ 99.0% pure
- AExcellent80+ points
- A-Very strong70–79 points
- BGood60–69 points
- CFair50–59 points. Highest grade after a failed safety panel
- DWeak40–49 points
- FFailingUnder 40 points
Lab verification tiers
What matters is whether anyone can confirm a report is genuine, not just which lab's name is on it.
- 3rd-Party · Independently Verifiable25 / 25 pts
Outside lab with a public self-service lookup (Janoshik task ID / QR, MZ Biolabs portal, Freedom Diagnostics Search Code / QR), so anyone can confirm the report is authentic and unaltered.
- 3rd-Party · Unverified Portal15 / 25 pts
A legitimate outside analytical lab, but there's no public self-service lookup to confirm the report wasn't edited.
- In-House / Manufacturer5 / 25 pts
Tested by the vendor or its manufacturer, not an independent lab.
- Unverified / No COA0 / 25 pts
No valid lab report is available for this batch.
Labs with a public lookup today: Janoshik (task ID / QR code lookup) · MZ Biolabs (online report portal) · Freedom Diagnostics (Search Code / QR code lookup (opens the lab's own copy of the report)). A report from one of these labs only counts as verifiable when it shows its lookup key.
Safety screening limits
| lead | < 0.5 µg/g |
| arsenic | < 1.5 µg/g |
| cadmium | < 0.5 µg/g |
| mercury | < 1.5 µg/g |
| Endotoxin | < 1 EU/mg |