The Chemistry Behind Lasting Love

Here is what neuroscience tells us about love's chemical picture:

• Dopamine creates the euphoric rush of new love but naturally fades after 1-3 years
• Serotonin drops during attraction, driving obsessive thinking about your partner
• Norepinephrine causes the racing heart, sweaty palms, and dilated pupils
• Oxytocin builds during physical touch, creating long-term bonding and trust
• Vasopressin supports protectiveness and loyalty in long-term partnerships

The shift from passionate to companionate love is not love fading — it is your brain moving from dopamine-driven excitement to oxytocin-driven security.