What is the normal range for vitamin D 25 OH d3?
What is the normal range for vitamin D 25 OH d3? The most accurate way to measure how much vitamin D is in your body is the 25-hydroxy vitamin D blood test. A level of 20 nanograms/milliliter to 50 ng/mL is considered adequate for healthy people. A level less than 12 ng/mL indicates vitamin D […]