Eating a healthy and a balanced diet can be difficult, particularly if you're short of time. There are times in your life when you may have increased needs for vitamins and minerals. For example, as you grow older you need more vitamin D and less iron and if you're having a baby it is recommended that you get an extra supply of folic acid as well as a sufficient intake of nutrients before and during pregnancy. Trying to ensure you eat a balanced diet at these times is important, however for some people it may be necessary to supplement your diet as well, in order to meet your body's nutritional needs.