Here 's a roundup of five medical studies published this week that might give you new insights into your health . Average BMI has stayed the same for Americans , but our family size is increasing . New artificial hormones make some mice food intolerant , leading to diabetes . Teens are doing fewer illicit drugs , a national survey finds .
Average BMI has stayed the same for Americans , but our family size is increasing . New artificial hormones make some mice food intolerant , leading to diabetes . Teens are doing fewer illicit drugs , a national survey finds .