Vitamins and minerals are important for health and optimal physical and mental performance. Students take fortified cereal at breakfast, sportsmen take energy bars and vitamin-enhanced sports drinks, and both children and the elderly take multivitamins. Always remember to tell your doctor and pharmacist if you are on any health supplements as they may interact with medications. Many people take supplements just in case their diet does not meet their nutrient needs. People tend to think that with anything good, for example vitamins and minterals, the more the better. While vitamins and minerals seem to be safe, too many supplements, combined with fortified foods and other whole foods in the diet, may actually cause harm. Vitamins and minerals when taken in excess can cause problems, or affect the body's ability to absorb or retain other nutrients. For example: Too much vitamin A (beta-carotene) can cause brittle nails, cracked lips and scaly skin. Too much vitamin C (ascorbic acid) can cause diarrhoea, kidney stones and skin rashes. Too much iron can cause lethargy, nausea, diarrhoea and abdominal pain. It is best to eat a balanced diet instead of depending on supplements. Most people normally get all the nutrients they need just from eating a balanced diet. Food also provide important components of a good diet that do not come in a pill, like fiber. Always consider carefully if there is really a need for taking supplements. If in doubt, discuss it with your doctor, pharmacist or call the DPIC at 6423-9119.