Batch testing

The reports, and what they do not cover.

Our manufacturer had batch 812 assayed by Janoshik Analytical, an independent lab. Those reports are below in full. Every one carries a verification key you can enter on Janoshik’s own site to pull up their copy, so none of this rests on our word.

Read this first

These are our manufacturer's tests, not ours.

The lab was commissioned by the manufacturer, which is why the client field reads GG rather than Boulder Labs. We are publishing supplier documents, not testing we paid for.

Your vial has no lot number on it.

Nothing printed on a vial you receive ties it back to batch 812. If you want certainty about the exact vial in your hand, these reports cannot give it to you.

Coverage is partial.

Five reports across one batch of two compounds. Every other product we sell has no report on this page, and we are not claiming otherwise.

Purity and content are product specs. Nothing here says what any compound does, and nothing here is a claim about safety or human use. Research use only.

Reports

Retatrutide 20mg

Size not currently sold

Janoshik task #226543 · Batch 812 · Analyzed Aug 26, 2026

Content measured: 21.04 mg, 20.34 mg
Purity: 99.748%, 99.731%
Label claim: 20mg
Vs label: +1.7% on the lower reading
Test: Common GLP-1 peptide blind test
Verification key: UT7EU5BTYFZP

Verify this report at Janoshik

Janoshik test report 226543 for Retatrutide 20mg, batch 812 — Open the full-size report

Retatrutide 30mg

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Janoshik task #226546 · Batch 812 · Analyzed Aug 26, 2026

Content measured: 30.59 mg, 34.38 mg
Purity: 99.819%, 99.802%
Label claim: 30mg
Vs label: +2.0% on the lower reading
Test: Common GLP-1 peptide blind test
Verification key: ZRLMJBQHATSB

Note on this one: the two assays came back 12% apart (30.59 mg and 34.38 mg). Both clear the 30mg label claim, but that is a wider gap than the other reports here and we would rather point at it than let you find it.

Verify this report at Janoshik

Janoshik test report 226546 for Retatrutide 30mg, batch 812 — Open the full-size report

Retatrutide 60mg

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Janoshik task #226552 · Batch 812 · Analyzed Aug 26, 2026

Content measured: 60.00 mg, 60.22 mg
Purity: 99.776%, 99.798%
Label claim: 60mg
Vs label: +0.0% on the lower reading
Test: Common GLP-1 peptide blind test
Verification key: 5I8DEG7JP5KB

Verify this report at Janoshik

Janoshik test report 226552 for Retatrutide 60mg, batch 812 — Open the full-size report

Tirzepatide 10mg

Size not currently sold

Janoshik task #226550 · Batch 812 · Analyzed Aug 26, 2026

Content measured: 10.37 mg, 10.09 mg
Purity: 99.340%, 99.408%
Label claim: 10mg
Vs label: +0.9% on the lower reading
Test: Common GLP-1 peptide blind test
Verification key: FL9QJBVWDDRI

Verify this report at Janoshik

Janoshik test report 226550 for Tirzepatide 10mg, batch 812 — Open the full-size report

Tirzepatide 60mg

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Janoshik task #226554 · Batch 812 · Analyzed Aug 26, 2026

Content measured: 60.29 mg
Purity: 99.690%
Label claim: 60mg
Vs label: +0.5% on the lower reading
Test: Common GLP-1 peptide blind test
Verification key: 9646U37TG1N3

Verify this report at Janoshik

Janoshik test report 226554 for Tirzepatide 60mg, batch 812 — Open the full-size report

How to check these yourself

Go to janoshik.com/verify.
Enter the verification key printed on the report above.
Janoshik returns their own copy. If what they show differs from what we show, believe them and tell us.

Questions about a batch, or want a report for something not listed? Ask us. If we do not have one, we will say so rather than send you something that does not match.