Vitamins Vitamins are organic (carbon-based) compounds that must be obtained via diet and cannot generally be synthesized in sufficient quantity by the organism. Currently, 13 vitamins are recognized including Vitamins A, B1, C, D, B2, E, B12, K1, B5, B7, B6, B3, and B9. Vitamins are needed in smaller quantities than other essential nutrients (e.g. essential fatty acids, proteins, carbs) and used to drive various fundamental biochemical functions such as metabolism and cell and tissue growth. Certain vitamins (e.g. vitamins E and C) help cells against oxidative/DNA damage otherwise known as antioxidants. Vitamins also classified as fat- and water-soluble. Fat-soluble vitamins absorbed primarily through the intestines with the help of fats, whereas water-soluble dissolve easily in water and excreted from the body via the kidneys (i.e. urine). Particular care should be taken when ingesting of fat-soluble vitamins as they can readily store and accumulate in the body and cause hypervitaminosis. Vitamins A, D, E, and K are fatsoluble vitamins. Commonly known vitamin deficiencies consist of beriberi (thiamin), pellagra (niacin), scurvy (vitamin C), and rickets (vitamin D). Dietery Minerals Similar to vitamins in that they are not-synthesized in the body and needed in small quantities, dietary minerals are inorganic (non-carbon based) compounds that must be obtained via diet and drive various biochemical reactions in the body. Unlike vitamins, minerals can be combined with different molecules (e.g. calcium carbonate, calcium citrate) to difference minerals compounds. The following minerals are considered essential: Mineral Potassium Quantity 4700mg Chlorine 2300mg Sodium 1500mg Calcium 1000mg Phosphorus 700mg Magnesium 420mg Zinc 11mg Iron 8mg Biological Use / Common Source Electrolyte found in legumes, potato skin, tomatoes, bananas Helps form hydrochloric acid in stomach and used for cellular pump functions found in table salt Electrolyte and used for ATP regulation found in table salt, spinach, milk, and sea vegetables Wide use in muscle, heart, and digestive systems as well as bone formation and cell functions found in dairy products, fish, green leafy vegetables, nuts and seeds Used in bones, cells and energy processing found in meat and milk Required for processing ATP and bones found in nuts, soybeans, and cocoa mass Used for various enzymatic processes found in highprotein foods Used for many proteins and enzymes with particular Source: Wikipedia and Medline Plus, March 2011 1 Manganese 2.3mg Copper 900ug Iodine 150ug Selenium 55ug Molybdenum 45ug emphasis of use in the blood (hemoglobin) Used in enzyme functions and found in nuts, legumes, seeds, tea, and green leafy vegetables Used in enzyme functions found in grains, beans, nuts, and meats Required for hormone production and can serve as an anti-oxidant found in table salt Used in enzymatic functions found in plant foods such as vegetables Used in enzymatic functions found in milk, legumes, meats, and cereals Antioxidants Oxygen is a highly reactive molecule that is required for most life on earth. It’s highly reactive nature is essential for most life and needed in many biological functions; however, its reactive nature also produces reactive oxygen species (e.g. oxygen ions and peroxides) and free-radicals both of which can damage many cellular components such as DNA, proteins, and lipids. Oxidative damage has been implicated in cancer, Alzheimers, rheumatoid arthritis, Parkinsons, and neurodegeneration to name a few examples. Basically, Antioxidants are compounds that let’s our bodies harness the reactive power of oxygen while minimizing its negative oxidative effects. Over time, plants began developing antioxidants such as vitamin C, polyphenols, and tocopherols to productively harness (or counteract) the reactive power of oxygen. Since then, better understanding the role vitamins A, C, and E has revolutionized our understanding of the oxidative process and of just how important antioxidants play in maintaining proper health. Antioxidants can be found in many foods including vegetables, fruits, grain cereals, eggs, meats, legumes, and nuts. Essential Fatty Acids (EFAs) Fatty acids are molecules used by the body to store energy because their metabolism releases a significant amount of energy. Because of these properties, fatty acids are used as fuels typically by skeletal and heart muscle tissues. Essential fatty acids are those fatty acids that humans cannot synthesize endogenously and therefore must be consumed to maintain good health. Essential fatty acids are polyunsaturated fatty acids and include omega-3 and omega-6 and can be found in foods such as fish, shellfish, flax, hemp, leafy vegetables, walnuts, and pumpkin seeds. EFA deficiency has been linked to various conditions including dyslexia, depression, memory problems, cancer, heart disease, allergies, diabetes and others. Fiber Dietary fiber is a complex carbohydrate that is not completely absorbed by the body. Generally, fiber is considered beneficial because it increases the weight/size of stool and softens it thus reducing the risk of gastrointestinal problems. However, the benefits of fiber can be known further by further breaking down the category. Fiber can be Source: Wikipedia and Medline Plus, March 2011 2 classified into two categories, soluble and insoluble, and these categories can be used to explain their different effects on the body. Soluble fiber is found in oats, peas, beans, and many fruits and can dissolve in water and therefore into digestive tract. Because of this absorption, soluble fiber helps form a protective gel which is thought to slow the movement of nutrients through the digestive tract and slow the absorption of sugar (and therefore potential glucose/insulin spike in the bloodstream). Insoluble fiber consists of fiber that cannot dissolve in water and are found in foods such as whole-wheat flour, nuts, and vegetables. Insoluble fiber is thought to help the intestinal muscular contractions that help nutrients move through the digestion tract. Probiotics Probiotics are microorganisms that are considered beneficial to the host organism. Our bodies have learned to fight pathogenic bacteria over the past millions of years, but they have also evolved to take advantage of non-pathogenic bacteria, as well. Processing lactose, a protein prevalent in dairy products, is a great example of the benefits of probiotics. Many individuals cannot efficiently convert lactose. Lactic-acid bacteria are probiotics that can help convert lactose into lactic acid and help lactose-intolerant individuals eat dairy foods that originally could not. Probiotics have a number of uses in medical treatment including lowering blood pressure, improving immune functions, lactose intolerance, antibiotic associated diarrhea, inflammation reduction, irritable bowel syndrome, and colitis. Probiotics can be consumed in foods with active probiotic cultures including yogurt, soy yogurt, and dietary supplements. Lactobacillus acidophilus and Bifidobacterium bifidus are two strains of probiotics commonly found in the foods above. Phytochemicals Phytochemicals are trace chemicals found in plants that are thought to have a beneficial impact on human health. Phytochemicals typical have some type of anti-oxidant benefit and have been found to help a wide range of human systems including cardiovascular, cell growth and regulation (cancer benefit), hormone regulation, and immunological. Type Flavonoids Food Sources Berries, herbs, vegetables, wine, grapes, tea Isoflavones Soy, red clover, kudzu root Isothiocyanates Cabbage family Monoterpenes Citrus peels, essential oils, herbs, spices, green plants Organosulfur Chives, garlic, onions Compounds Saponins Beans, cereals, herbs Source: Wikipedia and Medline Plus, March 2011 Potential Benefits General anti-oxidant as well as helping prevent heart disease General anti-oxidant. Cardiovascular, cancer, and menopause benefit Cancer benefit Cancer and gallstone benefit Cancer, cardiovascular, and immune system benefit Antioxidant. Cardiovascular, cancer, antiinflammatory, and hyperglycemia benefit 3 Capsaicinoids Chile peppers Cancer benefit. Pain relief Lean sources of protein Proteins are chains of amino acids and are the essential building blocks of every cell in our bodies. They serve as the foundation of cell components, cell signaling, enzymes, tissues, hormones, bones, skin, and every major and minor organ type in the body and in life as we know it. Amino acids are categorized as non-essential (the body can synthesize them internally) and essential (the body cannot synthesize them and there must be consumed). The body, therefore, requires regulat protein (i.e. amino acid) intake in order to make it’s own protein to growth, regulate, and maintain optimal health. Typical sources of protein include meats, tofu, soy products, eggs, legumes, and dairy products. Lean sources of proteins minimize fat (particularly saturated fat) content while providing significant quantities of both essential and non-essential amino acids. Lean sources of protein include minimally/not processed chicken less the skin, fish, red meat with minimal fat (not marbled), legumes, egg whites, and low/non-fat (nonflavored/sweetened) milk and soymilk. Low Glycemic Carbohydrates Carbohydrates include sugars, starches, and fiber and are generally used as fuel for the body. Carbohydrates can be categorized as simple carbohydrates, those that have oneor two-sugar units (e.g. monosaccharide, disaccharide), or complex carbohydrates, those that have more than two sugar units (polysaccharides). Originally it was thought that ingesting complex carbs were usually superior to simple carbs because complex carbs took longer to absorb and therefore not causing a rapid spike in glucose after ingestion. That turns out to be false, and a better way discern more nutritionally beneficial carbs is by knowing their glycemic index. A low glycemic carb will raise glucose levels by small amount regardless of complexity. Good sources of low glycemic carbs are fresh and canned fruits, vegetables, whole grains, and legumes. Low glycemic carbs do not provide a rapid energy boost but are also less likely to cause the energy crash of high-glycemic carbs found in such foods such as breads, potatoes, honey, and candy. Water Our bodies are mainly composed of water, thus water is the most essential need for life and to maintain proper nutrition and health. At a high-level, water helps the body regulate temperature, lubricate and cushion the joints, and remove waste via breathing/urinating/bowel movements. Because water is used for breathing, perspiration, and body temperature control, water consumption becomes even more important when one is physically active, living in warmer climates, running a fever, and being sick/having diarrhea. One estimate of the optimal amount of water to drink is to divide one’s body weight in half and drink that amount of water in ounces. That amount would need to be higher if one is sick, highly physically active, or living in warmer climates. 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