Food and nutrition.pdf

Nutrients 59in the absorption of Vitamin A, thus needing to increase the amountavailable in your diet.The Food and Nutrition Board's Committee on Diet and Healthrecommend that dietary cholesterol should be less than 300 milligramsper day.•Linoleic Fatty AcidLinoleic acid is an omega-6, polyunsaturated fatty acid, can not beproduced by the body and must be consumed in the diet, it is thus anessential fatty acid. A minimal adult intake of 3 to ,6 grams per day issufficient to prevent both biochemical and clinical evidence of deficiency.It is important for maintaining the structure and function of cellularand subcellular membranes. Linoleic fatty acid lowers cholesterol levelsin the blood and helps in the prevention of heart disease.A, deficiency has been associated with scaly skin, hair loss, andimpaired wound healing in hospital patients.The best natural sources are vegetable oils, wheat germ, sunflower,peanuts, pecans, almonds, avocados and eggs.Omega 3 Fatty AcidsEmerging research has suggested possible health benefits associatedwith moderate increases in dietary alpha-linolenic acid, including, reducedblood clotting tendency and reduced blood pressure. Data from the firstprospective intervention trial to investigate the effects of dietary fat, fishand fibre, which was conducted in Cardiff, Wales, supported the idea thatomega-3 fatty acids have a positive effect on reducing mortality fromcardiovascular disease.The principal sources of the omega-3 fatty acid alpha-linolenic acidare salad and cooking oil, salad dressing, shortening, margarine andproducts made from canola or soybean oils.VitaminsVitamins are organic substances functioning to facilitate an essentialbiochemical reaction necessary for growth, vitality and the normalfunctioning of our bodies. We must obtain them from our diet or takethem in the form of dietary supplements, that are usually derived fromplant and animal products. Crucial to the definition of a vitamin is thatlack of it produces a specific deficiency syndrome, and supplying it curesthat deficiency.It is almost impOSSible to sustain a healthy way of life by taking onlysynthetic supplements and not following a good eating plan. Supplementsshould be taken only with some nutrition knowledge or the guidance of a