You rely on concentration to get through work or school every day. When you're unable to concentrate, you can't think clearly, focus on a task, or maintain your attention. Your performance at work or school could be affected if you can't concentrate. You may also find...

Vitamin D is an essential ingredient in our lives. Adequate amounts of vitamin D promote calcium and phosphorus absorption—essential mechanisms for healthy bones and teeth—and is also considered by organizations such as the National Cancer Institute as a nutrient with potential to ward off serious diseases. Unfortunately, like...