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Cancer Incidence and Mortality After Treatment With Folic Acid and Vitamin B12. Ebbing M, Bønaa KH, Nygård O, Arnesen E, Ueland PM, Nordrehaug JE, Rasmussen K, Njølstad I, Refsum H, Nilsen DW, Tverdal A, Meyer K, Vollset SE. JAMA. 2009 Nov 18;302(19):2119-2126. v PMID: 19920236 Conclusion Treatment with folic acid plus vitamin B12 was associated with increased cancer outcomes and all-cause mortality in patients with ischemic heart disease in Norway, where there is no folic acid fortification of foods.

Circulating 25-hydroxyvitamin d levels and survival in patients with colorectal cancer. Ng K, Meyerhardt JA, Wu K, Feskanich D, Hollis BW, Giovannucci EL, Fuchs CS. J Clin Oncol. 2008 Jun 20;26(18):2984-91. PMID: 18565885 DOI: 10.1200/JCO.2007.15.1027 Conclusion Among patients with colorectal cancer, higher prediagnosis plasma 25(OH)D levels were associated with a significant improvement in overall survival. Further study of the vitamin D pathway and its influence on colorectal carcinogenesis and cancer progression is warranted.

Meat intake and mortality: a prospective study of over half a million people. Sinha R, Cross AJ, Graubard BI, Leitzmann MF, Schatzkin A. Arch Intern Med. 2009 Mar 23;169(6):562-71. PMID: 19307518 Red and processed meat intakes were associated with modest increases in total mortality, cancer mortality, and cardiovascular disease mortality