Red-Flag Watchlist
Where the supply chain is failing. These vendors and results carry the highest risk in our database as of 21 Aug 2026 — underdosed, overdosed, impure or simply not what the label claims.
12
Vendors rated E
bottom of the scale
21
Rated D or E
at least one bad product
25
Critical failures
scored 2.0 or below
88
Large deviations
±25% off label or worse
Vendors on the watchlist
24 of 96 shown| Vendor | Rating range | Worst grade | Avg | Tests | Products | Spread |
|---|---|---|---|---|---|---|
| HK Peptides | A A to E | E | 7.0 | 343 | 11 | 4 grades |
| Qing Li Peptide | A A to E | E | 6.9 | 260 | 13 | 4 grades |
| ZLZ Peptide | A A to E | E | 6.8 | 199 | 9 | 4 grades |
| Oupeptide | A A to E | E | 6.7 | 149 | 8 | 4 grades |
| Peptide-S | A A to E | E | 7.2 | 125 | 11 | 4 grades |
| Peptide Sciences | A A to E | E | 6.8 | 123 | 10 | 4 grades |
| Tianjin Ruiwang New Material Technology Co | A A to E | E | 7.3 | 107 | 6 | 4 grades |
| Yiwu Aozuo Trading Co | A A to E | E | 7.8 | 91 | 8 | 4 grades |
| Skye Peptides | A A to E | E | 7.1 | 73 | 10 | 4 grades |
| Uther | A A to E | E | 7.5 | 69 | 13 | 4 grades |
| Paramount Peptides | A A to E | E | 6.7 | 65 | 8 | 4 grades |
| Suaway Lab Research | A A to E | E | 5.4 | 39 | 8 | 4 grades |
| Amino Amigos | A A to E | E | 5.6 | 37 | 6 | 4 grades |
| Biolongevity Labs | A A to E | E | 6.0 | 33 | 5 | 4 grades |
| Loti Labs | A A to E | E | 5.0 | 32 | 6 | 4 grades |
| Injectify | A A to E | E | 7.3 | 29 | 6 | 4 grades |
| Heman Peptide HM | A A to E | E | 6.9 | 29 | 3 | 4 grades |
| Astro Peptides | A A to E | E | 6.6 | 29 | 4 | 4 grades |
| Deuschem | A A to E | E | 4.1 | 29 | 7 | 4 grades |
| Zenith Jove Peptide ZJ | A A to E | E | 7.0 | 26 | 2 | 4 grades |
| Forever Young Pharmacy | A A to E | E | 5.8 | 26 | 5 | 4 grades |
| Coastal Peptides | A A to E | E | 4.7 | 26 | 5 | 4 grades |
| Shandong Shengyuan Peptide Technology | A A to E | E | 7.5 | 24 | 2 | 4 grades |
| Bulk Peptide Supply | A A to E | E | 7.7 | 20 | 5 | 4 grades |
Worst recent results
Score ≤ 2.024 May 2026
0.0not found
23 May 2026
0.0not found
21 May 2026
2.0not found
29 Jan 2026
0.0not found
29 Jan 2026
2.0not found
29 Dec 2025
0.0not found
22 Dec 2025
0.0not found
17 Oct 2025
2.0not found
5 Oct 2025
0.0not found