Increase your vitamin D
Yes, vitamin D! Mushrooms are the only fruit or vegetable source of this critical vitamin. Like humans, mushrooms produce vitamin D when in sunlight. Exposing them to high levels of ultraviolet B just before going to market converts more of the plant sterol ergosterol into the so-called sunshine vitamin. In the U.S., portobellos fortified with vitamin D are already being sold, with a three-ounce (85-gram) serving providing about 400 IU of vitamin D (Osteoporosis Canada recommends that adults under 50 get 400 to 1,000 IU daily). William Stevens, CEO of the trade organization Mushrooms Canada, says, “A couple of Canadian producers are already testing this procedure.” He adds that “high D” or “sunshine” mushrooms should be in stores here in about six months or so.