text_1: Intake of folic acid (FA) and vitamin B6 (VB6) increases levels of homocysteine.
text_2: SETTING AND PATIENTS In 1980, a total of 80082 women from the Nurses' Health Study with no previous history of cardiovascular disease, cancer, hypercholesterolemia, or diabetes completed a detailed food frequency questionnaire from which we derived usual intake of folate and vitamin B6.