Hormone Peptides

Our hormone peptides are signaling peptides from the brain and gut: kisspeptin, oxytocin, PT-141 and VIP. They come as lyophilized vials, and PT-141 and oxytocin are also available as nasal sprays.

Looking for something else? Browse all research peptides, or see our peptide nasal sprays, peptide capsules and peptide bundles.

What are hormone peptides?

Hormone peptides carry signals between the brain and the rest of the body. Kisspeptin sits at the very top of the reproductive hormone chain and triggers GnRH release. Oxytocin is a nine-amino-acid hormone from the hypothalamus, and it was the first peptide hormone ever synthesized, in 1953.

PT-141 (bremelanotide) acts on melanocortin receptors in the brain, and VIP (vasoactive intestinal peptide) works in the gut, lungs, heart and the brain’s master clock. Each has a long research history of its own.

For the published research behind this range, start with this PubMed search.

Hormone peptides in our range

How to choose hormone peptides

Choose by the system you’re studying. Kisspeptin is the tool for reproductive axis research. Oxytocin suits social behavior and neuroendocrine work. PT-141 is for melanocortin receptor studies, and VIP covers smooth muscle, circadian and immune research.

Oxytocin and PT-141 both have long histories of intranasal research, so the sprays are worth a look. The PT-141 and oxytocin spray puts both in one bottle, and the Malibu bundle groups several signaling peptides at about 15% off.

Formats and prices at a glance

This range has 6 products: four lyophilized vials and two nasal sprays. Prices run from $49.99 to $69.99. Every product page lists the exact amount, the format and the SKU, so you can compare like for like before you order.

Quality, testing and storage

Most of our vials carry a QR code on the label that opens the certificate of analysis for that exact batch. Check the lot number on the COA against the vial before you open it, and keep a copy with your notes.

Store lyophilized vials in the fridge, or the freezer for long periods, and let them reach room temperature before opening. Sprays go in the fridge once opened. Capsules and lotions keep on a cool, dry shelf.

Brain and body signaling

These peptides act as messengers. Kisspeptin and oxytocin are made in the hypothalamus, PT-141 acts on melanocortin receptors in the brain, and VIP is released by nerves in the gut and lungs as well as the brain. Studying them together gives a wider view of how the brain talks to the rest of the body. Several of them also overlap with other ranges. PT-141 came out of Melanotan II research, and VIP plays a part in the circadian clock, which links it to sleep studies.

Hormone peptides FAQ

Which hormone peptides come as sprays?

PT-141 and oxytocin, separately in vial form and together in one nasal spray.

What is kisspeptin-10?

The active ten-amino-acid end of kisspeptin, the signal at the top of the reproductive hormone chain.

Do you sell a hormone peptide bundle?

Yes. The Malibu bundle groups kisspeptin, the PT-141 and oxytocin spray, MOTS-C and VIP.

Are hormone peptides for human use?

No. They’re sold for laboratory research only.

Buy hormone peptides from LA Peptides

Pick a product from the list above, add it to your cart and check out in a couple of minutes. Don’t forget BAC water if you’re ordering lyophilized vials. For multi-compound work, our peptide bundles save about 15%.

Hormone peptides from LA Peptides

For laboratory research use only. Not for human or veterinary use. Not evaluated by the FDA.

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