i am going for blood work and i need toknow if i have to fast. requistion for has TSH, CREATINE, SODIUM, POTASSIUM, CHLORIDE LIPID CHOLESTEROL, TRIGLICERIDES, URINALISIS, CBCCHECK OFF I REALLY NEED AN ANSWER IMMEDIATELY..HOPE YOU CAN HELP ME. IT WAS TOO LATE TO CALL THE BLOOD LAB.