'Bonding' hormone with effects on mood, social trust and intimacy.
Typical dose range: 10–40 IU
Frequency: As needed
Route: Intranasal / sublingual
Half-life: ~3 minutes (nasal much longer)
Evidence level: Strong (clinical use in obstetrics)
Effects are subtle and highly context-dependent. Nasal absorption is variable; sublingual troches are usually more reliable.