Vitamin E is the general classification for a group of eight fat-soluble compounds of tocopherols and tocotrienols. Vitamin E functions primarily as an antioxidant, but also has other roles in the body [1].
Tocopherols and tocotrienols are two classes of chemical compounds that have vitamin E activity. Vitamin E is made up of four tocopherols and four tocotrienols. Each of the compounds appear in alpha- beta- gamma- and delta- forms. The different forms of vitamin E have individual levels of biological activity and can be found in different increments in various foods and supplements [1].
Vitamin E in all its forms, functions predominantly as an antioxidant by protecting cells from free radicals in the body. Vitamin E works as an antioxidant by donating a hydrogen atom from a hydroxyl group to a free radical within the body. Vitamin E also plays a role in immune system function and protects cell membranes and regulation of gene expression. Vitamin E has been studied to uncover other medical usages, including prevention or treatment of many health conditions [1].
Vitamin E can be found in foods and dietary supplements. Natural vitamin E from food sources is called d-alpha-tocopherol. The dietary supplement for is dl-alpha-tocopherol. Vitamin E can be found in wheat germ, some nuts, seeds and oils and leafy green vegetables. Vitamin E appears in many fortified cereals as well. Wheat germ provides the highest concentration of vitamin E with sunflower seeds taking second place. One tablespoon of wheat germ oil provides one hundred percent of an adult’s RDI for vitamin E. One ounce of sunflower seeds fulfills thirty-seven of an adult’s RDI for vitamin E. Other food sources of vitamin E include sunflower, safflower, soybean and co...
... middle of paper ...
... into four different groups. The first group was given 400IU/day vitamin E alone, the second; 200ug/day selenium alone, the third; both and the fourth group; a placebo. The men were monitored over a median of six years. 529 men developed prostate cancer in the placebo group as compared to the 620 men in the vitamin E group who developed the disease. 575 men in the selenium group developed prostate cancer and 555 men in the combination group. The risk of prostate cancer in the United States is currently 16%. The results of the study showed that the risk of prostate cancer increased by 1.6% in men taking the vitamin E supplementation [6].
Medical and health professionals advise against individuals taking vitamin E supplements unless they have a specific condition that requires them to. Most of the vitamin E the average person needs they can obtain through their diet.
Brownstein, Joseph. “Some common vitamin supplements could increase death risk, study finds.” 10 October 2011. Vitals on mnsbc.com. Web. 11 January 2012. http://vitals.msnbc.msn.com/_news
Vitamin B12 deficiency limits selenium methylation and excretion resulting in higher tissue selenium levels and subsequent toxicity. It occurs in people whose digestive systems do not adequately absorb the vitamin from the foods they eat. Vegetarians who eat eggs and milk products are the most at risk because, on average, they consume less than half the adult vitamin B12 Recommended Dietary Allowance (RDA) while strict vegans (who don't eat any animal products, including meat, eggs, or milk) are at an even greater risk. Vitamin B12 is important since it works with the vitamin folate to make the body’s genetic material and help keep levels of the amino acid homocysteine in check which helps to decrease heart disease risk. It is also essential in the production of red blood cells which carry oxygen through the blood to the body’s tissues. Life Extension gives offers some of selenium supplements. Babies who are born of parents with low selenium and vitamin B12 rich foods are at risk of anaemia.
Avellini L, Chiaradia E, Gaiti a. Effect of exercise training, selenium and vitamin E on some free radical scavengers in horses (Equus caballus). Comp Biochem Physiol B Biochem Mol Biol. 1999;123(2):147–54. Available at: http://www.ncbi.nlm.nih.gov/pubmed/10425718.
The more the merrier right? Overtime people have continuously believed that vitamin supplements help the human body sustain a healthier body and well-being, however, have failed to realize the harm that vitamin supplements can do to the body; this is indicated by Paul Offit, the author of “The Vitamin Myth.” He states that over time researches and various studies have proved that Linus Pauling, the soul of the vitamin myth, statements of what vitamin supplements could do for the human body and or life. For example, the National Cancer Institute in 1994, researched smokers who were given various supplements over a period of time however those who were given supplements eventually showed signs of a more dangerous health state than those who did
Vitamin B12 is only found in animal products like eggs, meat, shellfish, and dairy and many groups of people
Vitamin D deficiency has become a key factor in predicting cardiovascular risk factors such as metabolic syndrome, diabetes mellitus, hypertension, and obesity. It is also a predictive factor of inflammation and fibrosis. All the key elements required for vitamin D function and metabolism e.g. vitamin D receptor and the two enzymes 1-alpha-hydroxylase and 24-hydroxylase are also present in the heart. Vitamin D could be involved in the pathogenesis of cardiovascular disease by exerting regulatory roles in vascular inflammation, proliferation and calcification, renin-angiotensin aldosterone system, myocardial fibrosis and cardiomyocyte proliferation. The effect of the sunshine vitamin on myocytes could reinforce its role as an important preventive or therapeutic agent. Results of studies indicate that vitamin D can improve myocytes differentiation alongside with decreasing cell proliferation which is one of the main elements contributing to plaque formation.
Vitamin C in the body acts as an antioxidant. Vitamin C loses electrons easily, a characteristic that allows it to perform as an antioxidant. In the body, antioxidants defend against free radicals. A free radical is a molecule with one or more unpaired electrons, which makes it unstable and highly reactive. By donating an electron or two, antioxidants neutralize free radicals and protect other substances from their damage. Figure 1 illustrates how vitamin C can give up electrons to stop free radical damage and then accept them again to become reactivated. This recycling of vitamin C is key to limiting losses and maintaining a reserve of
Vitamin D3 (ergocalciferol) originates from 7-dehydrocholesterol, a precursor of cholesterol when synthesized in the skin.3
Vitamin A, E, ,Lutein and zeaxanthin play vital roles in the body. Vitamin A for instance is essential for a healthy immune system, reproduction as well as bone growth. It also helps keep the skin healthy and helps the mucous membrane repel bacteria more effectively. It is essential for eye health. Deficiencies can cause a decline in retinal function. Vitamin E on the other hand is an antioxidant that protects the cells in your body from free radicals that damage cells and contribute to heart disease and cancer. Vitamin E is also essential for boosting the immune
Vitamin B12 is an essential nutrient that plays an important role in DNA synthesis and nerve function. It is contained in high amounts in animal derived foods such as milk, eggs, and meat. The vitamin is stored in the liver long-term. Individuals with vegetarian, vegan, or other forms of restricted diet may develop the condition after approximately 6 months as liver stores of vitamin B12 become depleted. Some individuals develop the condition due to autoimmune destruction of cells in the stomach that produce intrinsic factor. Intrinsic factor is necessary for proper absorption of vitamin B12 in the small intestine.
Vitamin, any of the organic compounds required by the body in small amounts for metabolism, to protect health, and for proper growth in children. Vitamins also assist in the formation of hormones, blood cells, nervous-system chemicals, and genetic material. The various vitamins are not chemically related, and most differ in their physiological actions. They generally act as catalysts, combining with proteins to create metabolically active enzymes that in turn produce hundreds of important chemical reactions throughout the body. Without vitamins, many of these reactions would slow down or cease. The intricate ways in which vitamins act on the body, however, are still far from clear.
When one hears the three words: vitamins, nutrients, and minerals, they think of one thing-being healthy and noticing what your intake is daily. Nutrition is all about vitamins and nutrients. Firstly, vitamins are an organic compound required by the body in small amounts of metabolism, to protect health, and for proper growth of children. Vitamins also assist in the formation of hormones, blood cells, nervous systems chemicals, and genetic material. There are 13 well-identified vitamins. Some examples of the 13 well-identified vitamins are: A, D, E, and K-fat contained foods, B, C-consumed immediately. A well known and commonly used in commercials for orange juice vitamin is vitamin C. Vitamin C or ascorbic acid is important in the synthesis and maintenance of connective tissues. The lack of vitamin C will result in a sickness called scurvy. Scurvy harms the gums, mucous membranes, and the skin. Another well-known vitamin and is also used to commercial to give more information about this beverage is the vitamin in milk. The vitamin in milk is vitamin D. If you do not drink milk and obtain this vitamin, your bones and teeth will become soft and weak. Lacking one or more of the 13 well-identified vitamins will cause sickness and weakness to your body. Secondly, nutrients are how the body assimilates certain compounds. Nutrients are classified in 5 major groups: proteins, carbohydrates, fats, vitamins, and minerals. One of the five nutrients is carbohydrate. The carbohydrate group principally consists of sugar, starch, dextrin, cellulose, and glycogen. In more basic terms, carbohydrates are sugars needed by human and other living organisms. Some types of foods that contain carbohydrates would be candies, ice cream, fruit juice, soda, chocolate bars etc. Lastly, vitamins are connected to minerals. Minerals are also a very important part of a healthy person. There are 11 major groups of minerals. They are: calcium, chromium, copper, iodine, iron, magnesium, manganese, phosphorous, potassium, selenium, and zinc. All these terms look very familiar if one has taken chemistry. These are the elements of our world. One of the more common minerals that most people have heard of is calcium. Calcium also helps with the structure and strength of teeth and bones. Vitamins and minerals work together to help humans maintain a healthy body. For example, vitamin D works with calcium to help for and maintain the strength of teeth and bones.
My average intake is 66 mg. it is lower than the required Vitamin C intake. Deficiency in Vitamin C can develop scurvy, if vitamin C is missing on our diet. Oranges, lemon and other citrus fruits, bell pepper, kiwi broccoli, berries, tomatoes and papayas are rich in Vitamin C . Lack of Vitamin D on diet can develop rickets to small children. The required intake for this vitamins is 15microgram and my report is zero. Vitamin D can be achieved from exposure of skin to ultra violet rays of the sun. Vitamin E is responsible for transmission of nerve impulses, body weakness and eye problem that can cause blindness. My nutrient intake for Vitamin 10 mg AT and the require intake is 15 mg AT, which is 5 mg lower than the require amount. Food related to Vitamin E are green leafy vegies such as spinach, kale are rich in Vitamin E, in addition, broccoli, hazel nuts, squash and pumpkin are also rich in Vitamin E. My vitamin K intake is 3 microgram, way too low compared to the requirement which is 90 microgram. Vitamin K deficiency can cause hemorrhagic disease of new born. Food that gives Vitamin K are green leafy vegetables such as kale and spinach, canola oils, olive oils, and
Vitamin D can often be obtained with two different methods. The main method is the conversion of 7-dehydrocholesterol in the skin into Vitamin D3 via sun exposure to absorb ultraviolet B radiation with a wavelength of 290-315nm (Holick 2007). The other method, is through consumption in diets through plants in the form of Vitamin D2; or fatty fishes, supplements or fortified vitamin D products in the form of Vitamin D3 (Lavie, Lee & Milani 2011). Vitamin D undergoes hydroxylation twice; first with the enzyme 25-hydroxylase to form 25-hydroxyvitamin D (Calcidiol) (Al Mheid et al. 2013). Then, Calcidiol is converted to the most active form of Vitamin D, 1,25-dihidroxyvitamin D Hormone (Calcitriol) with the help of renal 1--hydroxylase in the kidney (Al Mheid et al. 2013). Vitamin D2 and D3 are relatively similar since share the same hydroxylation pathway to produce Calcitriol (Tripkovic 2013), however, D3 has shown to have a greater influence on Calcidiol levels and thus more effective in maintaining Vitamin D health (Heaney et al. 2011).
Vitamins, a group of organic substances required in our diets in small amounts for growth and nutrition, are usually found in foodstuffs or taken as supplements. Yet vitamins probably present a wider gap between myth and reality in the layman's understanding than almost any other area of our diet. Surveys have found that while a majority of Americans do take vitamin supplements on a regular or occasional basis for reason of health concerns, there exists enormous confusion about the actual purpose and benefits of this practice ("Use of Vitamin and Mineral Supplements in the United States," 1990:161). Most people have a recognition that Vitamin C prevents scurvy, that Vitamin A is found in fish-liver oils, or that Vitamin D is found in dairy products; many people believe that Vitamin E preserves youth and prevents sterility, or that Vitamin C can present colds and cancer. Beyond this, however, there is still considerable ignorance and widespread myth.