Barn
Doses land close to the label; 0 of 6 vials were more than 10% under.
For research use only. VendorVerify sells nothing and takes no money from vendors. No affiliate links, no coupon codes, no paid rankings. How scores work
Every vial we have on file
- Within ±5% / purity 99%+
- 5–20% under, overfilled / purity 95–99%
- Failed: over 20% under, over 50% over, empty or under 95% pure
Dose vs label
6 vials measured · 0 emptyPurity
6 vials measured- Median purity
- 99.50%
- across 6 vials
- Median dose vs label
- +4.9%
- across 6 vials; + means more than the label
- Failed vials
- 20.4%
- 2 of 6 vials; the rate weights each lab report equally and recent reports more, as the score does
- Lab reports
- 5
- Mar 16, 2026 to Jun 16, 2026
Labs: Freedom Diagnostics, Janoshik, Peptide Test
Key facts
- VendorVerify holds third-party lab results for 6 Barn vials from 5 lab reports, dated Mar 2026 to Jun 2026.
- 2 of 6 Barn vials failed: empty, under 95% pure, more than 20% under the label or more than 50% over it.
- The median Barn vial tested at 99.50% purity across 6 vials with a purity result.
- The median Barn vial held +4.9% compared with its label across 6 vials where the lab measured the amount.
- Buyers have had 5 different compounds from Barn lab tested.
- Barn ranks #24 of 30 ranked vendors on the VendorVerify score.
- Barn vials on file were tested by Freedom Diagnostics, Janoshik, Peptide Test.
By peptide
| Peptide | Vials | Failed | Median purity | Median dose vs label | Dose vs label, −20% to +20% |
|---|---|---|---|---|---|
| Retatrutide | 2 | 2 | 89.06% | +0.7% | |
| KPV | 1 | 0 | 99.22% | +9.0% | |
| NAD+ | 1 | 0 | 99.78% | −7.5% | |
| Semaglutide | 1 | 0 | 99.88% | +19.0% | |
| Tirzepatide | 1 | 0 | 99.89% | +7.7% |
Lab reports
One row per tested vial, newest first.
| Date | Peptide | Lab | Label | Measured | Dose vs label | Purity |
|---|---|---|---|---|---|---|
| Jun 16, 2026 | RetatrutideBatch RT10260401 | Peptide Test | 10 mg | 10.209 mg | +2.1% | 88.93% |
| Jun 16, 2026 | RetatrutideBatch RT10260401 | Peptide Test | 10 mg | 9.928 mg | −0.7% | 89.19% |
| Jun 9, 2026 | KPVBatch 260321 | Freedom Diagnostics | 10 mg | 10.9 mg | +9.0% | 99.22% |
| May 27, 2026 | NAD+Batch NAD260327 | Freedom Diagnostics | 500 mg | 462.45 mg | −7.5% | 99.78% |
| May 1, 2026 | SemaglutideBatch K748-002 | Freedom Diagnostics | 30 mg | 35.71 mg | +19.0% | 99.88% |
| Mar 16, 2026 | TirzepatideBatch K748-004 | Janoshik | 60 mg | 64.64 mg | +7.7% | 99.89% |
Other lab tests
Endotoxin, TFA, counterion and contaminant checks, as reported by the lab. They are shown for transparency and are not part of the score.
| Date | Peptide | Test | Result | Lab |
|---|---|---|---|---|
| Jun 9, 2026 | KPVBatch 260321 | Endotoxin | Pass | Freedom Diagnostics |
| May 27, 2026 | NAD+Batch NAD260327 | Endotoxin | Pass (Assay Sensitivity: ≤0.05 EU/mL) | Freedom Diagnostics |
| Mar 18, 2026 | TirzepatideBatch K748-004 | Endotoxin | 22.713 EU | Janoshik |
Barn: common questions
Is Barn legit?
We can't vouch for any vendor as a business, and we don't sell or recommend products. What we can show is what buyers' independent lab tests found: 2 of 6 Barn vials on file failed, meaning they were empty, under 95% pure, more than 20% under the label or more than 50% over it. That places Barn #24 of 30 ranked vendors, below market on our score. Results on file run from Mar 2026 to Jun 2026.
Has Barn been third-party tested?
Yes. We hold results for 6 Barn vials from 5 lab reports, tested by Freedom Diagnostics, Janoshik, Peptide Test. Each result comes from a lab report a buyer paid for, not from a certificate the vendor supplied.
Are Barn vials dosed correctly?
Across 6 vials where the lab measured the amount, the median Barn vial held +4.9% compared with its label. 0 of 6 held more than 10% less than the label said.
How pure is Barn?
The median Barn vial tested at 99.50% purity across 6 vials with a purity result. We count anything under 95% as a failed vial, and a vial at 99.5% or higher gets full marks for purity.
Does Barn pay to be listed or ranked?
No. VendorVerify sells nothing and takes no money from vendors. No affiliate links, no coupon codes, no paid rankings. A vendor's place comes only from lab results.
Will my Barn vial match these results?
Not necessarily. A lab report describes the vials that were tested, and batches differ. A clean record lowers the odds of a bad vial but doesn't rule one out, which is why newer reports count for more in the score.
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