‘Love hormone’ draws social lines: Oxytocin helps prairie voles keep friends close—and strangers out
A new wave of vole research is reframing oxytocin’s role in social life: the hormone is less a universal “cuddle chemical” and more a fine-tuner of selectivity that helps animals invest in specific relationships while turning away outsiders. In female prairie voles lacking oxytocin receptors, friendships form late, wobble easily, and fail to trump contact with strangers, according to new findings reported by University of California, Berkeley neuroscientists and collaborators and summarized by The Transmitter as a study just out in Current Biology. The work suggests oxytocin receptors are not essential for general sociability or even romantic pair bonds—but are crucial for maintaining loyal, selective friendships that endure distractions in a crowd. Those insights, scientists say, could sharpen how we think about human friendship, loneliness, and the design of social environments in Thailand and beyond.