A sensitive test for folic-acid deficiency.
D002247:Carbon Isotopes; D005494:Folic Acid Deficiency / Q000097:blood / Q000175:diagnosis*; D005561:Formates / Q000378:metabolism; D006801:Humans; D008214:Lymphocytes / Q000378:metabolism; D008722:Methods; D012694:Serine / Q000096:biosynthesis
D002247:Carbon Isotopes; D005561:Formates; D012694:Serine