The processes by which hair, skin and nails grow require most of the same vitamins and minerals. Beta-carotene, vitamin B complex, vitamin C, vitamin E, magnesium, sulfur and zinc are all vital for growing healthy hair, skin and nails, according to the Vitamins and Nutrition Center. A multivitamin will contain most if not all of these vitamins. There are multivitamins specifically for hair, skin and nails that will contain all of the aforementioned vitamins.
Whether or not you will see results from taking a multivitamin, or from any of these vitamins individually, depends on whether or not your body needs that vitamin. The human body absorbs the nutrients it needs from the foods and supplements you consume. Your body does not store additional vitamins; it flushes them out. This means that if you are already getting the vitamins your body needs to grow healthy hair, skin and nails, adding more of any one vitamin is not likely to improve the condition or stimulate growth. However, if you are lacking in any of these vitamins, you may see anywhere from a mild to a drastic improvement.
It is wise to contact your health care professional if you suspect that your hair, skin or nails are not as healthy as they should be. Splitting nails, dry hair or any kind of skin problem may be an indicator about the condition of your general health. While taking a supplement may improve your condition, knowing exactly what the condition is will provide a more specific and possibly more effective treatment. If you have any preexisting medical conditions, consult your doctor before taking a multivitamin.