PT-141 Peptide for Sale | Compare Brands and Lab Reports

How to choose

Which PT-141 is right for your research?

Every brand is compared on the same points, using the information each brand publishes. Pick the one that fits how you work.

Compare on Information each brand publishes

Viora Our pick: recommended

Divine Steel Peptides

Trynity Peptides Lowest entry price

Who it's for

Best for

Researchers who want a lab report for every lot

Larger vial sizes, including Tesamorelin 20 mg

A low cost first order

Lab testing

Third-party lab report

Published, tested by Freedom Diagnostics

Coming soon

Purity on latest lot

99.85%

Coming soon

Other tests on the report

Content, Identity

Coming soon

Price

Vial sizes

10 mg

Price per vial

$72.38

$70

$35

Lowest price per mg

$6.15 (10 mg, 5 vials)

$5.95 (10 mg, 5 vials)

$2.98 (10 mg, 5 vials)

Shipping and returns

Dispatch

Not published yet

Shipping cost

$7.95 for Standard, free over $150

Returns

30 days on unopened vials

Damage claims within 48 hours

Prices from each brand, 24 Oct 2026

Choose Viora, $72.38

Choose Divine Steel, $70

Choose Trynity, $35

Viora Our pick

Best for: Researchers who want a lab report for every lot
Third-party lab report: Published, tested by Freedom Diagnostics
Purity on latest lot: 99.85%
Other tests on the report: Content, Identity
Vial sizes: 10 mg
Price per vial: $72.38
Lowest price per mg: $6.15 (10 mg, 5 vials)
Dispatch: Not published yet
Shipping cost: $7.95 for Standard, free over $150
Returns: 30 days on unopened vials

Choose Viora

Divine Steel Peptides

Best for: Larger vial sizes, including Tesamorelin 20 mg
Third-party lab report: Published, tested by Freedom Diagnostics
Purity on latest lot: 99.85%
Other tests on the report: Content, Identity
Vial sizes: 10 mg
Price per vial: $70
Lowest price per mg: $5.95 (10 mg, 5 vials)
Dispatch: Not published yet
Shipping cost: $7.95 for Standard, free over $150
Returns: 30 days on unopened vials

Choose Divine Steel Peptides

Trynity Peptides Lowest entry price

Best for: A low cost first order
Third-party lab report: Coming soon
Purity on latest lot: Coming soon
Other tests on the report: Coming soon
Vial sizes: 10 mg
Price per vial: $35
Lowest price per mg: $2.98 (10 mg, 5 vials)
Dispatch: Not published yet
Shipping cost: $7.95 for Standard, free over $150
Returns: Damage claims within 48 hours

Choose Trynity Peptides

Our recommendation

Viora

Viora is made and shipped in the USA, with a published lab report for the lot on your vial. Trynity costs less per order. Bought in 5 vial bundles, Trynity works out cheaper per mg ($2.98 vs $6.15).

Source: each brand's website, checked 24 Oct 2026. “Not published yet” means the brand has not made that information public.

Lab report

PT-141 test results, matched to the lot

Viora, lot VIO-PT-030826. Tested by Freedom Diagnostics, an independent laboratory, in 1 report dated 11 Aug 2026.

Purity

Pass

99.85%

HPLC-UV

View report

Content

Reported

8.66 mg

Net content

View report

Identity

Pass

PT-141 confirmed

LC-MS

View report

View full lab report

Divine Steel Peptides: lot DSP-PT-030826, 99.85% purity, Freedom Diagnostics. View report

Trynity Peptides lab report for PT-141: coming soon. It will appear here when it is uploaded.

PT-141 research guide · Updated 24 Oct 2026

What is PT-141?

PT-141, also known as bremelanotide, is a synthetic cyclic peptide of 7 amino acids that acts on melanocortin receptors. It is closely related to Melanotan II: the structure is the same, but it ends in a free acid instead of an amide. It is supplied as a lyophilized powder for in vitro and preclinical laboratory research only.

Full specifications

Sequence: Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-OH
Length: 7 amino acids (cyclic)
CAS number: 189691-06-3
Molecular formula: C50H68N14O10
Molecular weight: 1025.2 g/mol
Form: Lyophilized powder in a glass vial
Purity standard: 98% or higher (brand listing)
Storage: Minus 20 °C long term. 2 to 8 °C once reconstituted, use within 30 days.

How PT-141 is tested

A good PT-141 listing comes with a lab report for the exact lot in the vial. These are the results to look for:

Purity (HPLC)
How much of the sample is the compound
Identity (MS or LCMS)
Confirms it is the right molecule
Net content
The real mg in the vial versus the label
Endotoxin (LAL)
Bacterial residue, reported in EU
Sterility
Confirms nothing is growing in the vial
Heavy metals (ICP-MS)
Arsenic, cadmium, lead and mercury

Storage and handling

Lyophilized PT-141 is stable at room temperature while it ships. For long term storage keep vials at minus 20 °C. Once reconstituted for laboratory use, store at 2 to 8 °C and use within 30 days.

PT-141 vs kisspeptin and Melanotan 2

PT-141 and Melanotan II are melanocortin receptor agonists with almost the same structure. Kisspeptin-10 works on a different system, the KISS1 receptor. All three are sold here.

Compound Kisspeptin-10 Lab reports and price per mg by brand Read more → Compound Melanotan II Lab reports and price per mg by brand Read more →

Where to buy PT-141

Online Peptide Market shows every brand that sells PT-141 on one page, so you can compare lab reports, price per mg and shipping before you buy. Trynity Peptides offers a 10 mg vial. Viora offers a 10 mg vial with a published Freedom Diagnostics report. Divine Steel Peptides offers a 10 mg vial with a published Freedom Diagnostics report. Buy 3 vials to save 10%, or 5 vials to save 15%.

Questions and answers

PT-141 questions, answered

Where can I buy PT-141?

Right here. Online Peptide Market lists every brand's PT-141 on one page: Trynity Peptides (10 mg for $35), Viora (10 mg for $72.38) and Divine Steel Peptides (10 mg for $70). Compare lab reports, price per mg and shipping, then check out in one cart.

Is the PT-141 third-party tested?

Viora's PT-141, lot VIO-PT-030826, was tested by Freedom Diagnostics: 99.85% purity by HPLC-UV, identity confirmed by LC-MS and net content of 8.66 mg. Divine Steel Peptides' PT-141, lot DSP-PT-030826, was tested by Freedom Diagnostics: 99.85% purity by HPLC-UV, identity confirmed by LC-MS and net content of 8.66 mg. Trynity Peptides' report is coming soon.

What is the difference between PT-141 and kisspeptin?

PT-141 (bremelanotide) is a 7 amino acid cyclic melanocortin receptor agonist (CAS 189691-06-3). Kisspeptin-10 is a 10 amino acid fragment of kisspeptin that acts on the KISS1 receptor (CAS 374675-21-5). Both are sold here.

Do you offer bulk discounts on PT-141?

Yes. Buy 3 vials and save 10%, or 5 vials and save 15%. A 5 vial bundle of Trynity Peptides 10 mg works out to $2.98 per mg, the lowest price per mg on the page.

How should PT-141 be stored?

Keep lyophilized vials at minus 20 °C for long term storage. They are stable at room temperature while shipping. Once reconstituted for lab use, store at 2 to 8 °C and use within 30 days.

What does research use only mean?

Products are sold only for in vitro laboratory research. They are not drugs, supplements or cosmetics, are not FDA approved, and are not for human or veterinary use. Buyers must be 21 or older.

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