Having lots of friends could help you stay mentally fit in middle age.
A new study from Britain finds men and women who had ten or more friends they interacted with regularly were psychologically stronger than people with smaller groups, or no friends.
Having a network of relatives nearby also improved men's mental health, but not women.
Six thousand, five hundred adults born in 1958 were included in the study. They were questioned when they were 42, 45, and 50.