Copulins vs Androstenone: How Attraction Chemistry Actually Splits

Copulins and androstenone are the most-studied human pheromones - one female-derived, one male-derived. They don't compete; they pair. Here's the honest breakdown of what each one does and why a serious fragrance stack should respect both.

Copulins - the female signal

Copulins are a blend of short-chain aliphatic acids (acetic, propanoic, butanoic, etc.) first identified in primate vaginal secretions and later confirmed in human studies. Their documented effects:

• Elevated testosterone in nearby men (Jutte et al., 2001) - a measurable endocrine response, not just self-report.
• Shifted attractiveness ratings - men rate women's faces as more attractive when exposed to copulins, even at sub-conscious doses.
• Increased male attention and approach behavior in mixed-group settings.

Copulins are not a "smell good" molecule on their own - they're a chemosignal that works under the conscious scent of the perfume that carries them.

Androstenone - the male signal

Androstenone is a 16-androstene steroid present in male sweat and saliva. The well-replicated findings:

• Perceptions of dominance, competence and physical presence (Filsinger & Fabes, 1985; multiple replications through the 2010s).
• Increased seat-choice proximity in controlled environments - women sit closer to androstenone-treated chairs at statistically significant rates.
• Mood and arousal shifts in women, mediated by hormonal cycle phase.

Solo androstenone reads aggressive - that's why a real cologne pairs it with androstadienone and androstenol to buffer the signal.

How they pair, not compete

The mistake people make is treating these as rival options. They're sex-specific signals. Copulins live in women's perfumes; androstenone lives in men's colognes. A couple wearing both fragrances is the natural state - each partner amplifies the chemistry the other is wired to read.

Dosing - the part no one talks about

Both molecules need research-grade doses to do anything measurable. Specifically:

• Copulins: studies use ~10 mg/mL solutions, applied as ~0.1 mL doses. Most "copulin perfumes" ship with under 0.5 mg per bottle.
• Androstenone: studies use 200-800 µg per application. Drugstore pheromone sprays carry under 10 µg per spray - a 20-80x shortfall.

If a brand won't publish concentrations, assume the dose is decorative.

What this means if you're shopping

1. Women: look for copulins + estratetraenol + androstenol in a perfume with a warm base (amber, vanilla, sandalwood).
2. Men: look for androstenone + androstadienone + androstenol in a cologne with a fixative base. Cupids Hypnosis 2.0 stacks all three at research-grade dose in a spiced citrus → vanilla amber → clean musk frame.
3. Couples: the cleanest setup is both partners wearing a real formula. The chemistry is two-sided.

Bottom line

Copulins and androstenone aren't competing options - they're the two halves of human attraction chemistry. Pick the one that matches your side of the table, demand published dosing, and pair it with a scent you'd wear anyway. See the men's formula →