Experts say the findings of the study show that the inability to smile or frown, which can be a result of Botox, also effects how individuals read other faces.
When the days get shorter and darker, many people struggle with the blues. In this "Health Fusion" column, Viv Williams explores research about how the simple act of smiling even if you're not happy may help to lighten your mood and reduce stress.
Smiling can influence our emotions to make us feel happy, study finds stuff.co.nz - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from stuff.co.nz Daily Mail and Mail on Sunday newspapers.