Each offers unique benefits so knowing the difference is important before making a decision
doi: 10.1111/nph.16012 53
A blood test tells you whether you are actually low, so you are treating a real need, not guessing
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Analysis of data extracted from multiple databases, including the Centers for Medicare and Medicaid Services, National Center for Health Statistics, Medical Expenditure Panel Survey, NHANES, Department of Veterans Affairs, National Association of Children's Hospitals and Related Institutions, and various private data sets between 1994 and 2000 revealed an increase of 29% from $37 to $66 million among persons with a formal diagnosis of IC/BPS