ForumRetatrutide: 1, 2 or 3 mL of BAC water — what do you use, and why? · Retatrutide · 6 replies
✓ Purity · passShop-provided sample

Tirzepatide × Offline Peptides — lab test, May 2026

Lotlook this batch up across every shop →Check another lot
Tested · submitted by @offlinepeptides 👑 Legend
Sample source: shop-provided. The shop chose and sent this vial. The Trust Score counts it like any other published test; who sourced the vial is shown so you can weigh it yourself.How we weigh evidence →
HPLC Purity
99.6%
✓ Excellent purity only
Counts toward Offline Peptides's Trust Score until 29 May 2028
↓ Download COA
Independent verification available

Krause Analytical publishes a public verification portal. Any test attributed to this lab can be looked up and confirmed directly with the lab — so this result doesn't rest on our review alone. Please attach the original CoA from your vendor here. Screenshots or transposed documents cannot be validated.

This certificate carries no lookup code.

Test results

6 data points
Purity
99.6%
Endotoxins
Not tested
Sterility
Not on file
Heavy metals
Not tested
Stated qty
30 mg
Tested qty
39.4 mg
Qty match
131% of labeled · +31%
Batch / Lot
OP-TR30-0526
COA number
206043
Tested by
Krause AnalyticalView profile →

Not on file for this certificate: endotoxins, sterility and heavy metals. A purity figure says nothing about those.

About this test

What’s in the vial

Label 30 mg · Lab measured 39.4 mg

131% of label, basis not stated — shown as printed. Reconstituted with 2 mL, a 50-unit draw holds 9.9 mg using the measured mass, against 7.5 mg on the label — 31% more.

One vial from this lot was weighed by the laboratory, not yours. This page reports what the certificate says; it does not recommend a dose.

Independent HPLC purity analysis of Tirzepatide from Offline Peptides, performed by Krause Analytical on May 29, 2026. Reported purity: 99.6%. Net content: 39.4 mg against 30 mg labeled (131% of label). Tested content exceeds the labeled amount by 31%. Batch OP-TR30-0526. Sample source: shop-provided. Certificate of analysis attached.

Certificate of analysis

Original document
Issued by Krause Analytical · May 29, 2026 · Batch OP-TR30-0526

Other lots of Tirzepatide from Offline Peptides

LotTestedLabPurityvs labelStatus
OP-TR10-042619 Apr 2026Freedom Diagnostics99.57%94%✓ Lab-verified
OP-TR20-022617 Feb 2026Freedom Diagnostics99.523%107%✓ Lab-verified

Batches this shop has published a certificate for, newest first. A lot whose printed value cannot identify a batch is not listed.

Related lab tests

8 tests

The 1120 other Tirzepatide tests on Peptigrity range from 98.00% to 100.00%. This one sits at 99.60%.

More from Offline Peptides
More Tirzepatide tests
♡ Likes · 0

Community discussion

0 comments

Join the discussion — sign in to leave a comment on this lab test.

Sign in to comment →

Have you tested this peptide?

Submit your third-party lab test to help the community verify purity claims. Every report is reviewed before publication.