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A vitamin B test measures the amount of one or more B vitamins in your blood or urine (pee). B vitamins are nutrients that your body needs to work well and stay healthy. There are eight different types. All together, they are called the “B vitamin complex.”
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Blood tests are used to measure or look at cells, chemicals, proteins, or other substances in your blood . Blood testing, also known as blood work, is one of the most common types of lab tests. Blood work is often included as part of a regular checkup . Blood tests are also used to:
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