19260
By Science News
Lowered melatonin secretion was an implied factor in the 35 percent increase in colon cancer among night shift nurses, compared with their daytime counterparts. A couple of altered lifestyle factors may contribute, as well: The night shift is often occasion for a sedentary work style, and decreased alertness might even affect daytime activity. Also, there may be the tendency during the night toward eating low-fiber, oily, salty, and sugary snack foods.
Clyde Roggenkamp
Loma Linda, Calif.
M. Wood
Waianae, Hawaii