The symptoms of vitamin deficiency will normally present themselves when the lack of vitamins is at an advanced level. Those who don t get enough of vitamins A, B1, and B2 for example, will always feel tired, along with a loss of appetite. Other symptoms include mental and emotional stress, chapped lips, and other annoying or painful habits. The higher doses of B3 niacin, which are available only through prescription, have been proven to prevent and also improve a variety of different symptoms and ailments. Due to the high risk of toxicity, individuals should always consult with a doctor first, before they decide to start higher doses of B3 niacin. If you ve been having problems with your bones or just looking to keep your bones healthy, calcium supplements are what you need. You can find them online, or through local nutrition stores such as GNC. They don t cost a lot of money, yet they will give you the peace of mind in knowing that your bones will remain strong and healthy. You can also find supplement tablets that have a coated shell, although they are normally found in the cheaper vitamin and supplement stores. The capsule type of vitamin supplements is preferred by many, as they dissolve quickly, normally faster than the other delivery systems. Due to the fact of them not being compressed like tablets, you ll normally need to take two of them to get the same amount that s provided with one tablet. When consuming vegetables, you should always go for those that are rich in color, as they are high in what is known as phytonutrients. Phytonutrients are nutrients found in the skins of several fruits and vegetables, which give the food color as well as flavor and scent. Phytonutrients are quite simply the best types of antioxidant foods that you can find anywhere. With most dietary supplements in the U.S. being unregulated, you should always choose a manufacturer who is GMP compliant. Manufacturers that are GMP compliant will always follow the manufacturing standards of zinc, in order to minimize and quite possibly eliminate the risk of contaminants that you could be getting from the supplement.