Name: Oxytocin 5mg
Brand: Cyprus Peptides
SKU: CYP-4254
Price: 55.00 USD
Availability: InStock

Oxytocin at a glance

Oxytocin is a cyclic nonapeptide, Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH2, in which a disulfide bond between the two cysteines closes a six-residue ring and a short tail ends in an amidated glycine. Magnocellular neurons of the hypothalamus make it and release it into the bloodstream from the posterior pituitary, while other neurons distribute it within the brain. Vincent du Vigneaud's synthesis of the hormone was a landmark in peptide chemistry. Formula: C43H66N12O12S2; molecular weight 1007.19 g/mol.

Price and availability

Cyprus Peptides lists this single 5mg vial, shipped from Cyprus. $55.00 buys the whole kit, which is $11.00/mg. 6 brands sell Oxytocin on GLP1 Forum Escrow, with a typical price of $0.80–$1.80 per mg (median $1.50); this listing is above the typical range. As with every order here, the brand is paid only after you confirm delivery.

This listing: Cyprus Peptides Oxytocin

Brand: Cyprus Peptides
Other strengths: 50 IU $132.00
Also sold by: Uther Peptide 10mg $60.00 · SSRBIO 2mg $36.00 · Jinlu Peptides 2mg $108.00 · HK Peptide 10mg $80.00 · HK Peptide 2mg $30.00

Lab testing

There is no public lab report for this listing yet. We can ask the brand for the batch COA before you order. Many buyers also split an independent HPLC test with others who bought the same batch.

Request the batch COA · How group testing works

Bought through escrow: the brand is only paid after you confirm delivery. If the parcel never arrives, or an independent test shows the wrong compound or a significant under-fill, open a claim before releasing payment.

What it is studied for

Its receptor, OXTR, is a G-protein-coupled receptor that mainly signals through Gq, raising intracellular calcium. Peripherally, that drives contraction of uterine smooth muscle and of myoepithelial cells in the mammary gland. In the brain, receptors in the amygdala, nucleus accumbens and other regions are studied for roles in social recognition, pair bonding in prairie voles and stress-axis regulation. Oxytocin also binds vasopressin receptors at higher concentrations, and the structural similarity of the two hormones complicates interpretation. For spray formats, a central research question is how much peptide actually reaches the brain.

Research and regulatory status

Synthetic oxytocin is an approved medicine for inducing or strengthening labor and controlling postpartum hemorrhage, so its obstetric pharmacology is well documented. Behavioral research is a different story. Early studies of trust and social cognition attracted wide attention, but later replication efforts and larger trials, including in autism, often produced null or modest results. Methodological debates about measuring peripheral levels and central delivery continue. Outside obstetrics, it remains an investigational subject rather than an established intervention.

Checking the lab data

For a liquid spray, the report should cover more than purity. Mass spectrometry should confirm the oxytocin mass, and HPLC should quantify the peptide against a reference standard, since the label states concentration in international units. Related substances, such as deamidated or disulfide-scrambled forms, should be listed. Because the product is a solution, preservative identity, pH and microbial testing are relevant, along with a batch number and test date.

This listing has no third-party report on file yet. The lab reports directory and the marketplace show which brands do publish testing.

Listing details

Compound: Oxytocin
Class: Nonapeptide neurohormone
Format: Nasal spray
Molecular formula: C43H66N12O12S2
Molecular weight: 1007.19 g/mol
Vial strength: 5mg
Total content: 5 mg
Price per mg: $11.00
Sold by: Cyprus Peptides
Ships from: Cyprus
Lab report: Not yet published

Storage and preparation

Keep unopened freeze-dried vials cold, sealed and out of the light; moisture is what degrades a lyophilized cake fastest. After reconstitution, refrigerate the solution and work within the stability window your protocol sets.

Concentration arithmetic: one 5 mg vial dissolved in 2 mL gives 2.5 mg/mL, or 5 mg/mL in 1 mL. The Research Lab calculator in your dashboard handles any other volume.

Buyer questions

How is oxytocin related to vasopressin?

The two nonapeptides differ by only a small number of amino acids and share the same ring-and-tail architecture. Both are made in the hypothalamus, and each can activate the other's receptors to some degree. Researchers therefore use selective antagonists or receptor knockout models to attribute a finding specifically to oxytocin signaling.

Why does a spray format raise analytical questions that powders do not?

Peptides in solution degrade faster than lyophilized material, chiefly through deamidation and oxidation, and they need preservatives and a controlled pH. A spray therefore needs evidence that the stated concentration holds over time, not just at bottling. Stability data, a test date and the preservative system are worth checking alongside identity and purity.

How much Oxytocin is in this listing?

One vial of 5mg. Where a lab report exists, the testing panel above shows the measured content of the tested sample.

What if the parcel never arrives?

Open a claim from your order page. The payment is still in escrow at that point, so a claim decided in your favour is refunded to your Escrow Wallet.

Supplied for laboratory research only. Not for human or veterinary use, and not a substitute for any prescription medicine. Nothing on this page is medical advice.