Great Northern Peptides Tirzepatide
Evidence Score 63/100 · 3 of 3 Tirzepatide lab reports confirmed by the issuing lab
As of October 10, 2026, Great Northern Peptides lists Tirzepatide in 20, 40 mg. It publishes 3 Tirzepatide lab reports; 3 are confirmed in the issuing lab's own records, the newest dated August 17, 2026. Its confirmed reports cover purity testing (HPLC and mass spec). Code PEPASSESS gives 10% off.
Tirzepatide lab reports confirmed by the issuing lab
- August 17, 2026Freedom Diagnosticspurity, identityview report ↗
- August 17, 2026Freedom Diagnosticspurity, identityview report ↗
- March 20, 2026Freedom Diagnosticspurity, identityview report ↗
Tirzepatide price at Great Northern Peptides
- From
- —
- Best per mg
- —
- Typical per mg
- $5.00/mg
- Sizes
- 20, 40 mg
From Great Northern Peptides's own store, as of October 10, 2026; shipping and discounts not included.
Other Tirzepatide sellers with lab-confirmed reports
| Shop | Score | Per mg | vs typical | Code discount | Code | |
|---|---|---|---|---|---|---|
| Direct Peptides | 89 | — | — | — | — | Coupon codes |
| Peptides Optimized | 87 | — | — | — | — | Coupon codes |
| American Peptides | 86 | $4.28 | 14% below | — | — | Shop ↗ |
| PX1 Research | 85 | $4.60 | 8% below | 10% | Shop ↗ | |
| Bench Grade Peptides | 83 | $3.13 | 37% below | 10% first order | Shop ↗ | |
| MsAmino | 81 | — | — | — | — | Coupon codes |
Great Northern Peptides Tirzepatide questions
Is Great Northern Peptides's Tirzepatide lab tested?
Yes. As of October 10, 2026, Great Northern Peptides publishes 3 Tirzepatide lab reports, and PepAssess matched 3 to the issuing lab's own records (Freedom Diagnostics). The newest confirmed report is dated August 17, 2026.
Is there a Great Northern Peptides coupon code for Tirzepatide?
Yes: PEPASSESS (10% off), entered at checkout on greatnorthernpeptides.com, as of October 10, 2026.
Who else sells lab-tested Tirzepatide?
As of October 10, 2026, the highest-scoring Tirzepatide sellers with a lab-confirmed report, besides Great Northern Peptides: Direct Peptides (89/100, 59 confirmed), Peptides Optimized (87/100, 41 confirmed) and American Peptides (86/100, 26 confirmed).