For many people there is something unpleasant (what children call yucky, and Sigmund Freud called uncanny) about mucus. And yet we couldn’t live without it. These six facts might make you look at the gunk on your tissue in a whole new light.
Few foods naturally contain significant amounts of vitamin D, including oily fish, egg yolks, and some mushrooms. But many foods are fortified with the vitamin, notably milk and breakfast cereals. Here's a handy chart to guide you.