Some tests are accurate only if you have been fasting before having your blood drawn. If your provider tells you that you need to fast before your tests, you should not eat food or drink anything besides water. If your blood work is done early in the morning, DO NOT eat or drink anything besides water after midnight. You may take medications while fasting and you should drink plenty of water to stay hydrated and help make your blood draw easier. If your blood work is done in the afternoon, please DO NOT eat or drink anything besides water for at least six (6) hours before the appointment.