sexual healthcognitivefat losshormone

Oxytocin

Also known as The bonding hormone, The love hormone, OT, Pitocin (prescription form)

The bonding hormone — researched for connection, mood, sexual response, stress resilience, appetite and heart health.

Medical status: Approved (as Pitocin) for inducing labour and controlling bleeding after childbirth.

Also commonly used for (off-label)

Social bonding, trust and feeling connected
Libido, arousal and orgasm intensity in men and women
Stress resilience — blunting the cortisol spike
Appetite control and weight regulation (less snacking, better glucose and fat use)
Blood pressure and heart-rate support
Mood, calm and emotional warmth

Off-label and research uses are what people report, not approved indications. Talk to a clinician before using any of them.

How it's taken

Subcutaneous injection
a small shot into the fat just under the skin (belly, thigh, or love handle)
Nasal spray
sprayed into the nose and absorbed through the nasal lining — no needles

Availability varies by supplier — injectable is the most commonly researched form.

New to peptides? Start with the beginner's guide.

Documented dose: 50–200 mcg
Typical frequency: Once daily or as needed (nasal use is often situational)
Cycle: 8 weeks on, 4 off
Half-life: Very short — minutes in the bloodstream, though effects outlast it
Common vial sizes: 10 mg
Regulatory status: Approved prescription medicine (Pitocin) for obstetric use; compounded nasal and injectable forms for wellness are off-label.

Dose on a U-100 syringe

This dose is too large to draw in one standard U-100 insulin syringe at common mixes. It is typically drawn from a larger vial, mixed at a higher concentration, or split into more than one injection. Run your own vial through the reconstitution calculator.

What it does

Oxytocin is best known as the bonding hormone — your body releases it during touch, orgasm, childbirth and closeness — but research reaches much further. Socially, it is studied for trust, empathy and feeling at ease with people, and it reliably blunts the cortisol spike that comes with stress. In sexual health it is linked to arousal, orgasm intensity and post-sex closeness in both men and women. Metabolically, oxytocin receptors in the brain, gut and fat tissue are tied to appetite control (studies show reduced snacking and calorie intake) and to better glucose uptake and fat burning in muscle. It is also researched for blood-pressure and heart-rate support, anti-inflammatory effects, gut motility and wound healing. Effects are dose- and context-dependent — the same dose can feel warm and connecting in one setting and subtle in another. Doses are tiny, so a small syringe (or a nasal spray) matters.

Mechanism

Binds oxytocin receptors found throughout the brain, heart, gut, fat tissue and reproductive organs. In the brain it quiets the amygdala fear response, boosts dopamine reward pathways tied to bonding and pleasure, and dampens the HPA stress axis — which is how it lowers cortisol. In the body it contracts smooth muscle, improves glucose uptake and fat utilization in muscle and adipose tissue, slows gastric emptying and reduces food-seeking signals, and shows anti-inflammatory, antioxidant and blood-pressure-lowering effects on the cardiovascular system.

Storage — lyophilisedwhat's this?

Refrigerate the sealed vial.

Storage — reconstitutedwhat's this?

Refrigerate and use within about 4 weeks.

Reconstitution noteswhat's this?

Mix a 10 mg vial with 2.5 mL (250 units) of bacteriostatic water (4 mg/mL). Doses are very small: about 1–2 units is 50 mcg, 3 units is about 120 mcg, 5 units is about 200 mcg — a 0.3 mL or 0.5 mL syringe is strongly recommended. Intranasal spray is the most common research route (typically 24–40 IU, roughly 40–70 mcg, per use).

Stacks well with

Popular combinations reported in the community and research literature — not a recommendation. Adding peptides multiplies side-effect risk; check with a clinician.

Commonly reported side effects

Headache
Flushing or feeling warm
Nausea
Lightheadedness or a brief blood-pressure dip
Emotional sensitivity
Vivid dreams
Low blood sodium at high repeated doses

Contraindications noted

Pregnancy (it stimulates the uterus)
Heart rhythm disorders without clinician oversight
Very low blood pressure or fainting history without clinician oversight

Research notes

Most human research uses intranasal oxytocin, typically 24–40 IU per session. Studied areas include social bonding, trust and social cognition; reduced cortisol and anxiety under stress; sexual arousal and orgasm function in men and women; appetite and weight regulation — including reduced comfort-eating and improved insulin sensitivity — and cardiovascular protection such as lower blood pressure, reduced inflammation and healthier heart-rate variability. Results are famously person- and context-dependent, tending to be strongest in people under higher stress or with lower baseline social functioning. Prescription oxytocin (Pitocin) is used in obstetrics at much higher, clinically supervised doses.

Vendors carrying Oxytocin

These research suppliers list this compound. Prices, vial sizes and testing vary — always check the current lot certificate before you buy.

Peptide Streak does not sell peptides and is not affiliated with these vendors. Some list metabolic compounds under coded product names.