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    Home»Health & Beauty»Vitamins: Their Functions, Sources and deficiency
    Health & Beauty

    Vitamins: Their Functions, Sources and deficiency

    By s mNovember 10, 2019Updated:October 17, 2022No Comments7 Mins Read
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    Vitamins are organic (carbon-containing) substances required in small amounts to regulate various processes within living cells. Humans need 13 vitamins; of these, four are fat-soluble (A, D, E, and K), and nine are watersoluble (C and the B vitamins; thiamin, riboflavin, niacin, vitamin B-6, folate, vitamin B-12, biotin, and pantothenic acid). Solubility affects how a vitamin is absorbed, transported, and stored in the body. The water-soluble vitamins are absorbed directly into the bloodstream, where they travel freely. Excess amounts of water-soluble vitamins are generally removed by the kidneys and excreted in urine. Fat soluble vitamins require a more complex absorptive process. They are usually carried in the blood by special proteins and are stored in the liver and in fat tissues rather than excreted.

    Functions of Vitamins

    Many vitamins help chemical reactions take place. They provide no energy to the body directly but help release the energy stored in carbohydrates, proteins, and fats. Other vitamins are critical in the production of red blood cells and the maintenance of the nervous, skeletal, and immune systems. Some vitamins act as antioxidants, which help preserve the health of cells. Key vitamin antioxidants include vitamin E, vitamin C, and the vitamin A precursor beta-carotene.

    Sources of Vitamins

    The human body does not manufacture most of the vitamins it requires and must obtain them from foods. Vitamins are abundant in fruits, vegetables, and grains. In addition, many processed foods, such as flour and breakfast cereals, contain added vitamins. A few vitamins are made in certain parts of the body: The skin makes vitamin D when it is exposed to sunlight, and intestinal bacteria make vitamin K. Nonetheless, you still need to get vitamin D and vitamin K from foods. Life Botanics have a lot of affordable vitamins that may support the maintenance and improvement of hair health, testosterone levels, energy, and skin health and glow.

    Vitamin Deficiencies and Excesses

    If your diet lacks a particular vitamin, characteristic symptoms of deficiency can develop. For example, vitamin A deficiency can cause blindness, and anemia can develop in people whose diets lack vitamin B-12. Vitamin deficiency diseases are most often seen in developing countries; they are relatively rare in the United States because vitamins are readily available from our food supply. However, many Americans consume lower than-recommended amounts of several vitamins. Nutrient intake that is consistently below recommended levels can have adverse effects on health even if it is not low enough to cause a deficiency disease. For example, low intake of folate increases a woman’s chance of giving birth to a baby with a neural tube defect (a congenital malformation of the central nervous system). Low intake of folate and vitamins B-6 and B-12 has been linked to increased heart disease risk. A great deal of recent research has focused on vitamin D, suggesting that vitamin D supplementation can reduce the risk of cardiovascular disease and linking low vitamin D levels to an increased risk of several cancers. As important as vitamins are, however, many Americans consume less-than-recommended amounts of some vitamins.

    Extra vitamins in the diet can be harmful, especially when taken as supplements. Mega doses of fat-soluble vitamins are particularly dangerous because the excess is stored in the body rather than excreted, increasing the risk of toxicity. Even when supplements are not taken in excess, relying on them for an adequate intake of vitamins can be problematic. There are many substances in foods other than vitamins and minerals that have important health effects. Later, it discusses specific recommendations for vitamin intake and when a supplement is advisable. For now, keep in mind that it’s best to get most of your vitamins from foods rather than supplements.

    The vitamins and minerals in foods can be easily lost or destroyed during storage or cooking. To retain their value, eat or process vegetables immediately after buying them. If you can’t do this, store them in a cool place, covered to retain moisture—either in the refrigerator (for a few days) or in the freezer (for a longer term). To reduce nutrient losses during food preparation, minimize the amount of water used and the total cooking time. Develop a taste for a crunchier texture in cooked vegetables. Baking, steaming, broiling, grilling, and microwaving are all good methods of preparing vegetables.

    Vitamins: Their Functions, Sources and deficiency

    Choose more often                                                                      Choose less often

    Chinese Dishes that are steamed, poached (jum), boiled (chu), roasted (kow), barbeceued (shu) or lightly stir fried Hoisin sauce, oyster sauce, wine sauce, plum  sauce, velvet sauce or hot mustard

    Fresh fish seafood, skinless chicken, tofu

    Mixed vegetables, Chinese greens

    Steamed rice, steamed spring rolls, soft noodles

    Fried wontons or egg rolls

    Crab rangoon

    Crispy (Peking) duck or chicken

    Sweet and sour dishes made with breaded and deep fried meat, poultry, or fish

    Fried or crispy noodles

    Fried rice

    Greek Dishes that are stewed, broiled, or grilled, including shish

    kabobs (souvlaki)

    Dolmas (grape leaves) stuffed with rice

    Tzatziki (yogurt, cucumbers, and garlic)

    Tabouli (bulgur-based salad)

    Pita bread, especially whole wheat

    Moussaka, saganaki (fried cheese)

    Vegetable pies such as spanakopita and tyropita

    Baba ghanoush (eggplant and olive oil)

    Deep-fried falafel (patties)

    Gyros stuffed with ground meat

    Baklava

    Indian Dishes prepared masala (curry), tandoori (roasted in a clay oven), or tikke (pan roasted); kabobs

    Raita (yogurt and cucumber salad) and other yogurt-based dishes and sauces

    Dal (lentils), pullao or pilau (basmati rice)

    Chapati (baked bread)

    Ghee (clarifed butter)

    Korma (meat in cream sauce)

    Samosas, pakoras (fried dishes)

    Molee and other coconut milk-based dishes

    Poori, bhatura, or paratha (fried breads)

    Italian Pasta primavera or pasta, polenta, risotto, or gnocchi with marinara, red or white wine, white or red clam, or light mushroom sauce

    Dishes that are grilled or prepared cacciatore (tomato-based sauce), marsala (broth and wine sauce), or piccata (lemon sauce)

    Cioppino (seafood stew)

    Vegetable soup, minestrone or fagioli (beans)

    Antipasto (cheese, smoked meats)

    Dishes that are prepared alfredo, frito (fried), crema (creamed), alla panna (with cream), or carbonara

    Veal scaloppini

    Chicken, veal, or eggplant parmigiana

    Italian sausage, salami, and prosciutto

    Buttered garlic bread

    Cannoli

    Japanese Dishes prepared nabemono (boiled), shabu-shabu (in boiling

    broth), mushimono (steamed), nimono (simmered), yaki (broiled), or yakimono (grilled)

    Sushi or domburi (mixed rice dish)

    Steamed rice or soba (buckwheat), udon (wheat), or rice noodles

    Tempura (battered and fried)

    Agemono (deep fried)

    Katsu (fried pork cutlet)

    Sukiyaki

    Fried tofu

    Mexican Soft corn or wheat tortillas

    Burritos, fajitas, enchiladas, soft tacos, and tamales filled

    with beans, vegetables, or lean meats

    Refried beans, nonfat or low-fat; rice and beans

    Ceviche (fish marinated in lime juice)

    Salsa, enchilada sauce, and picante sauce

    Gazpacho, menudo, or black bean soup

    Fruit or flan for dessert

    Crispy, fried tortillas

    Dishes that are fried, such as chile rellenos, chimichangas, flautas, and tostadas

    Nachos and cheese, chili con queso, and other dishes made with cheese or cheese sauce

    Guacamole, sour cream, and extra cheese

    Refried beans made with lard

    Fried ice cream

    Thai Dishes that are barbecued, sautéed, broiled, boiled, steamed, braised, or marinated

    Sáte (skewered and grilled meats)

    Fish sauce, basil sauce, chili or hot sauces

    Bean thread noodles, Thai salad

    Coconut milk soup

    Peanut sauce or dishes topped with nuts

    Mee-krob (crispy noodles)

    Red, green, and yellow curries, which typically contain coconut milk

     

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