According to the textbook “vitamins are organic compounds that are essential in the diet in small amounts to promote and regulate body processes necessary for growth, reproduction, and the maintenance of health.” (Grosvenor & Smolin, Ch. 7 pg. 200) Vitamins are classified into two groups based of their solubility, as some are soluble in water and others are soluble in fat, with these characterizations we are able to know more about how the different types of vitamins are absorbed, transported, excreted, and stored within the body.
Your body gets the vitamins it needs through the foods consumed, as almost all foods contain vitamins of some sort, and all food groups contain foods, which are good sources of the various vitamins as well. Vitamins are important to the body as mentioned before; they are essential to help encourage and regulate regular bodily functions. Each vitamin has at least one important function in the body, and it is often that the different types of vitamins work together to ensure the health of a particular organ or system.
Fat-soluble vitamins are vitamins A, D, E, and K, and they are found along the fats contained in foods, in which they are also dissolved. Some high nutrient sources of fat-soluble vitamins are animal sources such as fortified milk and margarine, cheese, eggs, butter and liver for vitamin A. Egg yolks, liver, fortified milk and margarine, and sunlight are good sources of vitamin D. Polyunsaturated oils, leafy green vegetables, wheat germ, whole grain products, liver, egg yolk, and nuts and seeds are sources of vitamin E. With leafy green vegetables and milk providing vitamin K. (Healthwise, February 2011)
Fat-soluble vitamins provide many benefits to the body. For example, vitamin A is needed for vision and eye health, bone growth, tooth development, reproduction, and immune system regulation. It is also said that the skin along with the eyes and mucous membranes of
References: Bellows, L., & Moore, R. (April 19, 2013). Water Soluble Vitamins: B-Complex and Vitamin C. Retrieved from http://www.ext.colostate.edu/pubs/foodnut/09312.html Grosvenor, M. B., & Smolin, L. A. (2012). Visualizing Nutrition: Everyday Choices (2nd Ed.). Hoboken, NJ: John Wiley. Healthwise. (February 4, 2011). Vitamins & Supplements: Vitamins and Their Functions and Sources. Retrieved from http://www.webmd.com/vitamins-and-supplements/vitamins-and-their-functions-and-sources