In which nutrient is a person deficient if they have macrocytic anemia? Niacin Copper Vitamin $B_{12}$ Pantothenic acid
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Step 1: Define macrocytic anemia — it is anemia with enlarged red blood cells (MCV > ~100 fL), most commonly due to megaloblastic processes caused by impaired DNA synthesis. Show more…
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A 22-year-old woman comes to the physician because of increasing fatigue, light-headedness, and palpitations during the past 6 months. She has been following a strict vegetarian diet for 6 years. Her pulse is 100/min. Physical examination shows pallor. There is numbness and paresthesias of the upper and lower extremities. Serum studies show increased concentrations of methylmalonic acid and homocysteine. This patient's symptoms are most likely due to a deficiency of which of the following vitamins? A) Folic acid B) Vitamin B2 (riboflavin) C)Vitamin B6 (pyridoxine) D) Vitamin B12 (cobalamin) E) Vitamin C (ascorbic acid)
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Deficiency of which of the following vitamins leads to high levels of homocysteine in the blood?'
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Select all of the following that are true about the absorption, digestion and balance of Vitamin B12. Lack of B12 also triggers a deficiency of Niacin. Taking antacids like Prilosec and Nexium will help in B12 absorption. Elderly may not make enough intrinsic factor to absorb B12. Toxicity from taking high dose supplementation is common. It can be stored in the liver so doesn't need to be supplemented daily. Even small deficiencies can be associated with lower scores on intelligence tests, lowered spacial abilities and decreased short term memory. Deficiencies are associated with anemia and nerve damage. Deficiency is common in those with a vegan diet.
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