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Vitamins
Vitamins are a group of compound, required in small quantity for controlling metabolism and body functioning.
Vitamins are two types- fat soluble (A, D, E, K) and water soluble (B and C)
(A). Fat soluble Vitamins:
Vitamins (Name) | Rich food source | Functions | Deficiency Diseases |
A (Retinol) | Fish liver oils, dairy product, liver, most leafy vegetables and carrots contain carotene that can be converted into retinol | Needed for normal growth and induce differentiation of cells
Regeneration of rhodopsin in rod cells of the eyes. Maintain of normal vision Essential for immune system. |
Dry skin, night blindness(Nyctalopia) |
D (Calciferol) | Fish oils, egg yolk and butter. It can be made by the action of sunlight on skin | Promotes absorption of calcium from intestine.
Necessary for formation of normal bone |
Rickets in children (soft bones that bend easily). Osteomalacia (painful bones) in adults |
E (Tocopherol) | Vegetables oils, cereal products, whole grain, nuts, egg, butter etc | Formation of red blood cells, affect muscles and reproductive system.
Maintain healthy cholesterol level |
Mild anaemia and sterility. |
K (Phylloquinone) | Fresh, dark green vegetables. Also made by gut bacteria | Formation of prothrombin (involved in blood clotting | Delayed clotting time. May occur in new born babies before their gut bacteria become established |
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(B). Water soluble Vitamins
Vitamins | Rich food source | Function | Deficiency Diseases |
B1 (Thiamine) | Pork, cereals, nuts, seeds, yeast, whole grain | Essential in converting glucose to energy
Important to nerve function |
Beriberi (weakness of limb muscles) |
B2 (Riboflavin) | Milk, milk products, leafy vegetables, eggs | Involved in the formation of RBC, maintenance of body tissue particularly skin and eyes
Essential for metabolizing carbohydrates, fats and lipids. |
Cracked skin,blurred vision |
B3 (Niacin) | Meat, whole grain, cereals, beans | Important for nervous system, digestive system and skin health | Pellagra (severe skin problem, Diarrhea, dementia) |
B5(Pentothenic Acid) | Whole grain cereals and legumes | Part for an enzyme needed for energy metabolism | Pellagra, Dermatitis, Diarrhea |
B6(Pyridoxine) | Meat, fish, egg, vegetables | Used to build RBC and maintain nerve tissue
Necessary for immune system functioning |
Skin problem, Nerve disorder |
B9 (Folic Acid) | Leafy green vegetables, liver, | Necessaryto build nucleic acid, which are essential for making new cells especially RBC | Anemia |
B12(Cyanocobalamine) | Liver, milk, fish, meat | Help build and maintain protective nerve sheath
Needed for RNA and DNA synthesis. |
Pernicious anemia, nerve disorder |
C (Ascorbic acid) | Citrus fruits, tomatoes, leafy vegetables | Protect cellular function
Important for immune system |
Scurvy (bleeding of gums, teeth falling) |
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