Claims vs COA / American Peptides
American Peptides: claims vs COA
Website claim: 99% purity. “…Sourced · USA Shipped ◆ Free Shipping on Orders Over $300 ◆ ≥99% Purity — HPLC + Mass Spec ◆ Endotoxin Tested · Sterility Verified…” Source (read 2026-09-25)
99
certificates read
29 / 67
vials outside ±3% of label
1
beyond ±10% (major)
0 / 99
below advertised purity
| Product | Label → measured | Purity | Main impurity | Lab | COA |
|---|---|---|---|---|---|
| COA4846_41170589-fa9e-4be8-b514-e3d19bd2975f.pdf | 1mg → 1.21mg Overfilled +21.0% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4844_dd221250-baff-4c16-9e6e-a5f718520e7a.pdf | 10mg → 10.68mg Over label +6.8% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4845_f5bc67a9-b26b-443c-b2ee-eab7ed8ef6a0.pdf | 20mg → 20.93mg Over label +4.7% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4847_a6d0d148-be7c-452d-83bf-4f90db5096ca.pdf | 10mg → 10.56mg Over label +5.6% | 99.8% Meets 99% | 0.20% not itemised | bioviridian | Open |
| COA4848_1d76fed0-da20-417e-8dfd-a7ea63d708fe.pdf | 20mg → 20.72mg Over label +3.6% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4849_116f5d2b-2b68-4f3f-9d6e-65d29194f2b2.pdf | 10mg → 10.66mg Over label +6.6% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4851_31f71259-a585-409a-81e4-6680bb720530.pdf | 10mg → 10.42mg Over label +4.2% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4853_e50e60be-bbab-4184-9eff-d63352c188b5.pdf | 5mg → 5.23mg Over label +4.6% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4865_58f7e29d-12e4-42b6-8056-f5abda6a74f0.pdf | 20mg → 20.64mg Over label +3.2% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4866_2804b175-d68d-4b71-abdb-2029d590ea62.pdf | 5mg → 5.25mg Over label +5.0% | 99.8% Meets 99% | 0.20% not itemised | bioviridian | Open |
| COA5627.pdf | 10mg → 10.49mg Over label +4.9% | 99.8% Meets 99% | 0.20% not itemised | bioviridian | Open |
| COA5632.pdf | 10mg → 10.52mg Over label +5.2% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA7580.pdf | 10mg → 10.61mg Over label +6.1% | 99.83% Meets 99% | 0.17% not itemised | — | Open |
| COA7583.pdf | 10mg → 10.6mg Over label +6.0% | 99.79% Meets 99% | 0.21% not itemised | — | Open |
| COA7585.pdf | 10mg → 10.87mg Over label +8.7% | 99.78% Meets 99% | 0.22% not itemised | bioviridian | Open |
| COA7586.pdf | 10mg → 10.5mg Over label +5.0% | 99.82% Meets 99% | 0.18% not itemised | bioviridian | Open |
| COA7589.pdf | 10mg → 10.62mg Over label +6.2% | 99.84% Meets 99% | 0.16% not itemised | — | Open |
| COA7591.pdf | 5mg → 5.19mg Over label +3.8% | 99.75% Meets 99% | 0.25% not itemised | — | Open |
| COA7596.pdf | 10mg → 10.39mg Over label +3.9% | 99.78% Meets 99% | 0.22% not itemised | bioviridian | Open |
| COA7601.pdf | 10mg → 10.38mg Over label +3.8% | 99.76% Meets 99% | 0.24% not itemised | — | Open |
| COA7602.pdf | 5mg → 5.21mg Over label +4.2% | 99.72% Meets 99% | 0.28% not itemised | bioviridian | Open |
| COA7605.pdf | 20mg → 20.92mg Over label +4.6% | 99.79% Meets 99% | 0.21% not itemised | — | Open |
| COA7609.pdf | 5mg → 5.33mg Over label +6.6% | 99.73% Meets 99% | 0.27% not itemised | bioviridian | Open |
| COA7610.pdf | 20mg → 20.8mg Over label +4.0% | 99.68% Meets 99% | 0.32% not itemised | bioviridian | Open |
| COA7616.pdf | 10mg → 10.86mg Over label +8.6% | 99.72% Meets 99% | 0.28% not itemised | bioviridian | Open |
| COA7619.pdf | 30mg → 30.94mg Over label +3.1% | 99.83% Meets 99% | 0.17% not itemised | bioviridian | Open |
| COA7622.pdf | 10mg → 10.63mg Over label +6.3% | 99.68% Meets 99% | 0.32% not itemised | bioviridian | Open |
| COA7623.pdf | 20mg → 20.77mg Over label +3.9% | 99.8% Meets 99% | 0.20% not itemised | bioviridian | Open |
| COA7627.pdf | 10mg → 10.93mg Over label +9.3% | 99.83% Meets 99% | 0.17% not itemised | bioviridian | Open |
| COA3390.pdf | Not measured | 99.8% Meets 99% | 0.20% not itemised | bioviridian | Open |
| COA3394.pdf | Not measured | 99.8% Meets 99% | 0.20% not itemised | bioviridian | Open |
| COA3396.pdf | Not measured | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA3400.pdf | Not measured | 99.8% Meets 99% | 0.20% not itemised | bioviridian | Open |
| COA3402.pdf | Not measured | 99.7% Meets 99% | 0.30% not itemised | bioviridian | Open |
| COA3404.pdf | Not measured | 99.8% Meets 99% | 0.20% not itemised | bioviridian | Open |
| COA4841_94653df7-283c-4032-bf2e-876da658963c.pdf | 600mg → 602.43mg On label +0.4% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4842_88c5d4c4-dfe2-4f0c-bc92-a4d1859d988b.pdf | 500mg → 502.47mg On label +0.5% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4843_f76a5ce6-0720-4694-8969-f1d0dc708a1c.pdf | 1000mg → 1002.51mg On label +0.3% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4850_ba8f5ddc-dcf4-4928-b3f1-d2b0fcedd552.pdf | 10mg → 10.13mg On label +1.3% | 99.8% Meets 99% | 0.20% not itemised | bioviridian | Open |
| COA4852_7af7f8c8-3487-497d-8d94-6d80d70b1a52.pdf | 60mg → 60.57mg On label +1.0% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4854_c23b9b30-4778-4c87-807a-ba0ecd98a0b5.pdf | Not measured | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4855_07f24ed0-efdd-43e4-b7b4-db9f9f60bbbb.pdf | Not measured | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4857_7f8bf4c5-7f8e-42c5-9f15-a7e66ee7d866.pdf | 60mg → 60.79mg On label +1.3% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4858_75f40f59-4c65-4039-90a4-58d8f3f66b8e.pdf | 30mg → 30.84mg On label +2.8% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4859_0bb55841-0df7-4cef-bc3c-27410088b987.pdf | 10mg → 10.21mg On label +2.1% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4860_4fc388a1-3c67-4530-9e71-03bbb9f07cca.pdf | Not measured | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4861_7a34d91e-b1c0-47c6-acf0-d5a1ca41f169.pdf | 20mg → 20.13mg On label +0.7% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4862_9831cf83-82a1-451b-a81e-07b0a7089725.pdf | 10mg → 10.05mg On label +0.5% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4863_edf8f3c7-746f-4142-bc68-6566b69ebc2e.pdf | 10mg → 10.13mg On label +1.3% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA4864_c60199d2-31d2-4468-a472-4d107000d569.pdf | Not measured | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA5623.pdf | Not measured | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA5624.pdf | 100mg → 101.17mg On label +1.2% | 99.8% Meets 99% | 0.20% not itemised | bioviridian | Open |
| COA5625.pdf | 50mg → 50.67mg On label +1.3% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA5626.pdf | Not measured | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA5628.pdf | 20mg → 20.58mg On label +2.9% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA5629.pdf | Not measured | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA5630.pdf | 16mg → 16.39mg On label +2.4% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA5631.pdf | Not measured | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA5633.pdf | 48mg → 48.16mg On label +0.3% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA5634.pdf | 100mg → 101.25mg On label +1.3% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA5635.pdf | Not measured | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
| COA7577.pdf | Not measured | 99.81% Meets 99% | 0.19% not itemised | — | Open |
| COA7578.pdf | 100mg → 101.36mg On label +1.4% | 99.86% Meets 99% | 0.14% not itemised | bioviridian | Open |
| COA7579.pdf | 30mg → 30.84mg On label +2.8% | 99.78% Meets 99% | 0.22% not itemised | bioviridian | Open |
| COA7581.pdf | Not measured | 99.84% Meets 99% | 0.16% not itemised | bioviridian | Open |
| COA7584.pdf | Not measured | 99.77% Meets 99% | 0.23% not itemised | bioviridian | Open |
| COA7587.pdf | 50mg → 50.98mg On label +2.0% | 99.87% Meets 99% | 0.13% not itemised | bioviridian | Open |
| COA7588.pdf | Not measured | 99.55% Meets 99% | 0.45% not itemised | — | Open |
| COA7590.pdf | 50mg → 50.9mg On label +1.8% | 99.75% Meets 99% | 0.25% not itemised | bioviridian | Open |
| COA7592.pdf | 500mg → 503.42mg On label +0.7% | 99.78% Meets 99% | 0.22% not itemised | bioviridian | Open |
| COA7593.pdf | 100mg → 101.88mg On label +1.9% | 99.85% Meets 99% | 0.15% not itemised | — | Open |
| COA7594.pdf | Not measured | 99.7% Meets 99% | 0.30% not itemised | — | Open |
| COA7595.pdf | 10mg → 10.23mg On label +2.3% | 99.68% Meets 99% | 0.32% not itemised | — | Open |
| COA7597.pdf | 1500mg → 1505.41mg On label +0.4% | 99.76% Meets 99% | 0.24% not itemised | bioviridian | Open |
| COA7598.pdf | Not measured | 99.8% Meets 99% | 0.20% not itemised | bioviridian | Open |
| COA7599.pdf | Not measured | 99.79% Meets 99% | 0.21% not itemised | bioviridian | Open |
| COA7600.pdf | Not measured | 99.78% Meets 99% | 0.22% not itemised | bioviridian | Open |
| COA7603.pdf | Not measured | 99.71% Meets 99% | 0.29% not itemised | bioviridian | Open |
| COA7604.pdf | Not measured | 99.76% Meets 99% | 0.24% not itemised | — | Open |
| COA7606.pdf | 10mg → 10.18mg On label +1.8% | 99.8% Meets 99% | 0.20% not itemised | bioviridian | Open |
| COA7607.pdf | Not measured | 99.8% Meets 99% | 0.20% not itemised | — | Open |
| COA7608.pdf | 10mg → 10.29mg On label +2.9% | 99.78% Meets 99% | 0.22% not itemised | — | Open |
| COA7611.pdf | 1000mg → 1004.23mg On label +0.4% | 99.74% Meets 99% | 0.26% not itemised | bioviridian | Open |
| COA7612.pdf | 30mg → 30.73mg On label +2.4% | 99.87% Meets 99% | 0.13% not itemised | bioviridian | Open |
| COA7613.pdf | 60mg → 61.11mg On label +1.9% | 99.79% Meets 99% | 0.21% not itemised | bioviridian | Open |
| COA7614.pdf | 10mg → 10.2mg On label +2.0% | 99.73% Meets 99% | 0.27% not itemised | bioviridian | Open |
| COA7615.pdf | — → 5.16mg Not checked | 99.78% Meets 99% | 0.22% not itemised | bioviridian | Open |
| COA7617.pdf | 30mg → 30.69mg On label +2.3% | 99.85% Meets 99% | 0.15% not itemised | bioviridian | Open |
| COA7618.pdf | Not measured | 99.88% Meets 99% | 0.12% not itemised | — | Open |
| COA7620.pdf | Not measured | 99.75% Meets 99% | 0.25% not itemised | bioviridian | Open |
| COA7621.pdf | Not measured | 99.78% Meets 99% | 0.22% not itemised | bioviridian | Open |
| COA7624.pdf | 10mg → 10.15mg On label +1.5% | 99.78% Meets 99% | 0.22% not itemised | bioviridian | Open |
| COA7625.pdf | 10mg → 10.24mg On label +2.4% | 99.85% Meets 99% | 0.15% not itemised | bioviridian | Open |
| COA7626.pdf | Not measured | 99.81% Meets 99% | 0.19% not itemised | bioviridian | Open |
| COA7628.pdf | 50mg → 51.02mg On label +2.0% | 99.77% Meets 99% | 0.23% not itemised | bioviridian | Open |
| COA7629.pdf | 60mg → 61.26mg On label +2.1% | 99.85% Meets 99% | 0.15% not itemised | bioviridian | Open |
| COA7630.pdf | 10mg → 10.18mg On label +1.8% | 99.79% Meets 99% | 0.21% not itemised | bioviridian | Open |
| COA7631.pdf | Not measured | 99.82% Meets 99% | 0.18% not itemised | bioviridian | Open |
| On o | 20mg → 20.38mg On label +1.9% | 99.9% Meets 99% | 0.10% not itemised | bioviridian | Open |
How this is checked
- Vial content. Measured net peptide content against the size on the label. Within ±3% is on label, 3–10% is off label, beyond ±10% is a major deviation (under- or overfilled). When a certificate weighs several vials of the batch, the vial farthest from the label is the one judged, and with several purity results the lowest counts. Blends are only checked when the certificate lists each component.
- Purity. HPLC purity on each certificate against the purity the supplier promises site-wide on its own website. Up to 1 point below the claim is amber, more than that is red. Only a direct promise counts (“99%+ purity guaranteed”); explanations of what purity means, one product's figure and page code are not treated as a claim. A certificate that reports only a bound (“>99%”) is judged only when the bound meets the claim, and a specification line is never read as a result.
- Whose certificate. A certificate is only read once our client-identity review has looked at it, and one issued to a different company is left out — whether the automatic check or a manual review found it. A certificate issued to the company that runs the supplier's own website counts as the supplier's. A file hosted on another supplier's website is not counted for this one. The same rules decide which certificates appear on supplier and product pages. Only peptide certificates are read: bacteriostatic water, acetic acid and other diluents are left out, and so are product data sheets, which state a specification rather than a batch result.
- Main impurity. Shown when the certificate itemises it: a named impurity (TFA, deletion sequence, oxidation…) or the largest secondary peak in the HPLC peak table. Most certificates report only a purity figure, so the rest of the sample is not itemised.
- Trust Score. These checks are 10 of the 25 Transparency points: vial content 7 (full credit within ±3%, half up to ±10%, none beyond, over- and underfilled alike), purity 3 (98% is the bar when a supplier advertises no figure). Fewer than 5 readable results gives half credit rather than a guess.
- These are the supplier's own published certificates, read automatically from the PDF or image. Janoshik results tables are read twice from the image, cell by cell, and a figure the two readings disagree on is left out rather than guessed. A certificate covers one batch on one date. We have not tested these batches ourselves.