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NCT02066688 2014-02-20Study of Folic Acid, Calcium and Vitamin D in Preventing Colorectal Polyps and Colorectal CancerShanghai Jiao Tong University School of MedicinePhase 2/3 Unknown2,400 enrolled
NCT01426490 2014-02-19The Effects of Vitamin B-6 Status on Homocysteine, Oxidative Stress, One-carbon Metabolism and Methylation: Cross-section, Case-control, Intervention and Follow-up Studies in Colorectal CancerTaichung Veterans General HospitalPhase 2/3 Unknown300 enrolled
NCT00033319 2013-09-17Aspirin and/or Folic Acid in Preventing Recurrent Colorectal PolypsNational Cancer Institute (NCI)Phase NA Unknown