From children to seniors, up to 80% of us are deficient in vitamin D, claims Dr. Eric Madrid, in his illuminating new book Vitamin D Prescription-The Healing Power of the Sun & How It Can Save Your Life. Vitamin D not only builds strong bones, but it can help prevent or control diseases such as diabetes, high blood pressure, lupus, and even cancer. Madrid urges readers to have their blood vitamin D levels checked by their physicians and to supplement with vitamin D pills. He also advises to limit the sunscreen and soak up the healthy rays of the sun instead. Filled with thought-provoking...