The association of vitamin D deficiency with colorectal cancer: A wake-up call for physicians and health authorities

Although there is evidence that vitamin d deficiency leads to the development of several cancers,including colorectal cancer,research has shown gaps in establishing a relationship between hypovitaminosis d and the incidence of colorectal cancer. there are controversial reports and inadequate scientific evidence about the role of age and race-specific dosage of vitamin d supplementation for chemoprevention. this editorial sheds light on the current evidence on the association of vitamin d deficiency and colorectal cancer,the role of vitamin d supplementation,and the future action plans to establish the needs analysis and goal setting about this area of research. © 2017,shiraz university of medical sciences. all rights reserved.