If you take calcium supplements in large doses, you may experience constipation, vomiting, nausea, a loss of appetite, a dry mouth, and a loss of appetite. If you start to have any of the above problems, you should immediately contact your doctor. When you contact your doctor, you should let him know if you are taking any other medications, and any histories of illness or diseases your family may have. Even though you may be on a healthy diet, you should still make sure that you are getting the proper vitamins and supplements as well. Supplements will help your body get the vitamins and minerals it needs, especially on days that you aren t able to eat what you should. Life can get hectic at times, which is where supplements can really come in handy. Vitamin supplements are the easiest way to give your body what it needs. You can use vitamins and supplements in your normal diet, although you ll need to choose them accordingly with what you need and what your diet consists of. Even though there are many vitamins that you can benefit from, one of the most important is B12, which can raise your energy levels and help with your immune system. In the past, research has shown Vitamin E to help those who have already suffered the wrath of a heart attack. This vitamin helps to prevent heart attacks in the future by opening up the arteries and eliminate blockage. Those who have had a heart attack in the past are always encouraged to add more vitamin E to their diet. 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. With millions of dollars in revenue each year and over 100 chains throughout the United States, GNC is a dominant name in the world of vitamins and supplements. If you need to take vitamins or supplements but aren t sure what you should take, you should consult with your doctor. Vitamins and supplements are a great way to get minerals and nutrients to your body, although they should never, ever, be used to replace food.