Folate test

Key facts Folate is an important nutrient for growth, development, and the correct function of your red blood cell and nerve tissues. The folate blood test checks for levels of folate in your blood and red blood cells. Low folate can prevent your red blood cells from developing normally and can cause nerve damage. Your folate levels can be affected by different conditions or medicines, and your diet. You may need to fast for 6 to 8 hours before your folate blood test. What is being tested? Folate is an important nutrient for making red blood cells and for repairing cells