HLTH 230 Chapter Notes - Chapter 6: Hypervitaminosis D, Methionine, Thyroid

• School: Queen's University
• Department: Health Studies
• Course: HLTH 230
• Professor: Jeffery Lalonde

Document Summary

Unit 6 water; vitamins and minerals: part i. Vitamins are organic, essential nutrients required for energy metabolism, physiological functioning and deficiency disease prevention. They generally appear as individual units rather than chains. Minerals are inorganic, essential nutrients which do not yield energy but may aid in release of energy from energy yielding nutrients. Unlike vitamins, minerals cannot be destroyed and aren"t changed in form. Bioavailability is the rate and extent to which vitamins and minerals are absorbed and used carbs, fats, and proteins results in virtually complete/efficient digestion/absorption. Bioavailability depends on efficiency of digestion, gi tract health, previous nutrient intake/status, foods contained at the same time, method of preparation, source of the nutrient. 3 levels/effects more = effect gets better and better, more = effect reaches a maximum and then a plateau, more = effect reaches an optimum at some intermediate dose and then declines (harmful)