A total of 47 men with a mean SD age of 46.5 5.1 y , who were overweight [ body mass index ( in kg/m ( 2 ) ) from 25 to 30 ] but otherwise healthy , received 5 1-g capsules of KS oil or a control ( canola oil ) for 8 wk and crossed over to another treatment after an 8-wk washout period .