How Do You Measure Vitamin A Levels? An Overview of Testing Methods
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4 min read
The World Health Organization reports that vitamin A deficiency affects an estimated 190 million preschool-age children worldwide. The gold standard for assessing vitamin A levels is a liver biopsy, but this invasive method is not practical for routine clinical use. A variety of other tests, including blood work and dose-response assays, are commonly used to accurately measure vitamin A levels and determine an individual's nutritional status.
