Vitamin B6, also known as pyridoxine, is a vital nutrient that plays a crucial role in various bodily functions, such as protein metabolism, neurotransmitter synthesis, and immune system function. A Vitamin B6 test is a diagnostic tool used to measure the levels of this nutrient in the blood. It can help identify a deficiency or excess of Vitamin B6, which may be linked to certain medical conditions, such as anemia, neurological disorders, and cardiovascular disease. The test typically involves taking a blood sample and analyzing it in a laboratory. The results can help guide treatment decisions, such as dietary modifications or supplements, to optimize Vitamin B6 levels and improve overall health.