Girls who spend the most time on social media at age 10 may be unhappier in their early teens than peers who use social media less during the tween years, a U.K. study suggests. Researchers looked at social media use and scores on tests of happiness and other aspects of well-being among boys and girls at age 10 and each year until age 15. Overall, well-being decreased with age for boys and girls, but more so for girls. And high social media use early on predicted sharper increases in unhappiness for girls later. For boys, social media use at 10 had no association with well-being in the midteens, which suggests that other factors are more important influences on well-being changes in boys, the authors note in BMC Public Health. A pattern for girls “Our findings suggest that young girls, those aged 10, who are more interactive with social media have …