Vitamins and minerals


Vitamins and minerals


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USMLE® Step 1 questions

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Vitamins and minerals

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USMLE® Step 1 style questions USMLE

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A group of investigators are studying the absorption sites of various vitamins and minerals in the digestive tract. Which of the following is the site of absorption of vitamin B12?  

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Vitamins and minerals are essential nutrients that our bodies need in small amounts to function properly and can only get through diet or supplementation. Vitamins are organic compounds that act as coenzymes and cofactors for various metabolic processes. Each vitamin has a specific role in the body. Minerals are inorganic substances that our bodies need for various functions, and some of the most important minerals include calcium, iron, magnesium, potassium, sodium, and zinc. While a balanced diet can provide the necessary vitamins and minerals, some people may need supplements to ensure they are getting enough of certain nutrients. Even though deficiencies are deleterious to the body, too much of certain vitamins and minerals can lead to toxicity.


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