Research at Yokohama National University in Japan on oxytocin shows promise in promoting hair growth in human hair follicles. However, oxytocin itself is too large a molecule to be absorbed by our skin and it breaks down too quickly for use. Consequently, researchers have turned their attention to cinnamic acid, a small molecule that can activate oxytocin receptor expression. The researchers found that treatment with the cinnamic acid led to an increase in the expression of oxytocin receptors...