The ABC's of Vitamin D...Vitamin D is still being researched, but it is believed to be important for your heart and cardiovascular system, to avoid certain cancers, to keep your bones healthy and strong, to decrease respiratory infections, to maintain muscle strength, and to maintain a healthy weight. Many Americans are low - probably more than 50% of us. You can get Vitamin D from sun exposure and foods like, milk, orange juice, fortified cereals (check the label), salmon, mackerel, blue fish, shitake mushrooms, cheese, and of course vitamin supplements. The suggested daily intake from all sources is 600 to 2000 IU daily. If you get it checked, remember that 30 and above is normal, 21-29 is an insufficiency, and 20 and below is a deficiency. Before you ask your doctor to check it though, make sure it will be covered. The major lab companies can charge up to $200 for that test if your insurance carrier decides not to pay for it.