Early-Onset Colorectal Cancer 2X less likely if consume more than 450 IU of Vitamin D daily – Aug 2021

Total Vitamin D Intake and Risks of Early-Onset Colorectal Cancer and Precursors

Hanseul Kim. Marla Lipsyc-Sharf, Xiaoyu Zong. Yin Cao §. Kimmie Ng §. Edward L. Giovannucci §
Gsteroenterology:July 06, 2021 DOI:https://doi.org/10.1053/j.gastro.2021.07.002 Publisher wants $36 for thee PDF

Background & Aims
Vitamin D has been implicated in colorectal cancer (CRC) pathogenesis, but it remains unknown whether total vitamin D intake is associated with early-onset CRC and precursors diagnosed before age 50.

Methods
We prospectively examined the association between total vitamin D intake and risks of early-onset CRC and precursors among women enrolled in the Nurses’ Health Study II. Multivariable-adjusted hazard ratios (HRs) and 95% confidence intervals (CIs) for early-onset CRC were estimated with Cox proportional hazards model. Multivariable-adjusted odds ratios (ORs) and 95% CIs for early-onset conventional adenoma and serrated polyp were estimated with logistic regression model.

Results
We documented 111 incident cases of early-onset CRC during 1,250,560 person-years of follow-up (1991 to 2015). Higher total vitamin D intake was significantly associated with a reduced risk of early-onset CRC (HR for ≥450 IU/day vs <300 IU/day, 0.49; 95% CI, 0.26–0.93; P for trend = .01).
The HR per 400 IU/day increase was 0.46 (95% CI, 0.26–0.83). The inverse association was significant and appeared more evident for dietary sources of vitamin D (HR per 400 IU/day increase, 0.34; 95% CI, 0.15–0.79) than supplemental vitamin D (HR per 400 IU/day increase, 0.77; 95% CI, 0.37–1.62). For CRC precursors, the ORs per 400 IU/day increase were 0.76 (95% CI, 0.65–0.88) for conventional adenoma (n = 1,439) and 0.85 (95% CI, 0.75–0.97) for serrated polyp (n = 1,878).

Conclusions
In a cohort of younger women, higher total vitamin D intake was associated with decreased risks of early-onset CRC and precursors.

References include

• Global patterns and trends in colorectal cancer incidence in young adults.
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