The more balanced your diet, the more The Holistic Medicine of the necessary vitamins you will consume. Try to consume at least five fruit and veggie portions daily along with a bit of protein. If you are unable to do this, vitamin and mineral supplements are a good idea.
Many people who are in need of supplemental vitamins and minerals simply struggle physically with swallowing the pills as they can be large and, in all honesty, horrible tasting. Try drinking water that has vitamins and minerals includes with some sort of fruit taste added. This allows you to get some of the vitamins you require as well as adding to your daily water intake.