A folate level test evaluates serum vitamin B9 levels, which are essential for DNA synthesis and cell division. Low levels may indicate anemia, malnutrition, or health issues, while elevated levels can result from supplementation. The test aids doctors in assessing folate deficiency and implementing treatment for pregnant women to reduce neonatal defects. Patient should be fasting, it is also advisable to avoid multivitamins containing biotin for previous 12 hours before the blood draw.