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Role of Vitamin A in Good Nutrition Vitamin A is a fat-soluble vitamin which is stored primarily in the liver. Vitamin A is available in two forms: - Retinol, which is found in animal products. - Beta carotene, which your body converts into vitamin A. Key Functions Vitamin A is essential for healthy skin, eyesight, growth and reproduction. It performs a variety of important functions: Beta carotene is a powerful antioxidant that neutralizes free radicals – molecules that damage healthy cells – and increases the risk of accelerating the aging process and/or health conditions. Vitamin A promotes the growth of strong teeth and bones. Fat is used to build new cells and is critical for normal brain development and nerve function. Vitamin A is essential for the formation of visual purple, a pigment that allows you to see in dim light. Food Sources Vitamin A is present in liver, cod liver oil, carrots, and sweet potatoes. Retinol is found in meat, fish, eggs and dairy products. Beta carotene is present in orange and yellow fruits and vegetables and dark, leafy greens. Usage Check with your local market for the recommended daily intake of vitamin A. Safety Evidence When relying on food sources, be aware that vitamin A and beta carotene can be destroyed by heat.
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VITAMIN A (BETA KAROTEN, RETINOL) - Vitamin A je prvi otkriveni vitamin. Vrlo je važan za dobar vid, zdravu kožu, kosu i sluznice grla, nosa, dišnog i probavnog sustava. Potreban je i za pravilan rast i razvoj kosti i zuba. Još jedna njegova značajna djelotvornost je i u pospješivanju zacjeljivanja rana i primjenjuje se za liječenje kožnih poremećaja. Također, preporučuje se uzimanje nekoliko mjeseci prije i za vrijeme sunčanja. - Beta karoten, prethodnik vitamina A je pigment koji se nalazi u biljkama. Koža stvara zalihe beta karotena, organizam ga prerađuje i po potrebi proizvodi vitamin A. Višak beta karotena djeluje kao antioksidans i potiče rad imunološkog sustava. - Nalazi se u naranči, te žutom voću i povrću, također u tamnozelenom lisnatom povrću (npr.kelj), vrhnju, maslacu te punomasnom mlijeku. - Vitamin A se dugo skuplja u organizmu, pa posebni dodaci nisu preporučljivi jer previše tog vitamina može izazvati glavobolje, mučnine, povraćanje…