beta-carotene…

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what the risks are blood test, carotene, test that measures the amount, beta-carotene in blood, vitamin a test, beta-carotene, precursor to vitamin a blood is drawn, a vein on the inside, the elbow, the hand, puncture site is cleaned, antiseptic, an elastic band, around the upper arm to apply pressure, restrict blood flow, the vein, veins below the band to fill, blood, a needle is inserted, vein, blood is collected in an air-tight vial, a syringe, band is removed, restore circulation, once the blood has been collected, needle is removed, puncture site is covered to stop any bleeding, an infant, young child, area is cleansed, antiseptic, punctured, a sharp needle, a lancet, blood collected, pipette, small glass tube, on a slide, onto a test strip, into a small container, cotton, a bandage applied, puncture site, any continued bleeding, fast, 6 hours, advise to not take potentially interfering drugs, vitamin a, retinol, infants, children, test depends on child's age, previous experience, prepare child, infant test, procedure preparation, birth to 1 year, toddler test, procedure preparation, 1 to 3 years, preschooler test, procedure preparation, 3 to 6 years, schoolage test, procedure preparation, 6 to 12 years, adolescent test, procedure preparation, 12 to 18 years, the needle is inserted to draw blood, feel moderate pain, others feel only a prick, stinging sensation, some throbbing, beta-carotene levels measured, a vitamin a deficiency is suspected, beta-carotene is metabolized, broken down, to vitamin a, beta-carotene is also measured, an indirect measure of lipid, fat, absorption, a fat-soluble nutrient, normal range is 60 to 200 mcg/dl, micrograms per deciliter, abnormal results, lower-than-normal, elevated levels, lower-than-normal levels, indicate a diet inadequate in beta-carotene, a problem, intestinal absorption of fat-soluble substances, termed steatorrhea, elevated levels, indicate hypervitaminosis a, excessive vitamin a causing headaches, yellow skin, loss of appetite, nausea, diarrhea, dry, itchy skin, hair loss, bone pain, cessation of menstruation in women, pregnancy, an excess of vitamin a, cause birth defects, this risks associated, having blood drawn, excessive bleeding, fainting, feeling light-headed, hematoma, blood accumulating under the skin, infection, a slight risk, the skin is broken, multiple punctures to locate veins, this test, valuable part, the diagnosis of vitamin a deficiency, actual diagnosis, interpretation, the test result in conjunction, clinical findings, beta-carotene, precursor to vitamin a, vitamin a, fat-soluble vitamin found primarily in fish, dairy products, green, yellow vegetables, essential, normal growth, regulation of metabolism, vision, cell structure, strong bones, teeth, healthy skin, protecting the linings, the digestive, respiratory, urinary tracts from infection, signs of vitamin a deficiency, vision problems, inability, at night, bone, teeth development problems, unexplained irritability, skin rashes, hair loss, dry, inflamed eyes, loss of appetite, recurring infections, beta-carotene also functions, a fat-soluble antioxidant, help protect the body from harmful "free-radical" reactions, veins, arteries vary in size, obtaining a blood sample.