Cancer mortality reduced 40 pcnt by 2000 IU Vitamin D daily if normal weight – Meta-analysis June 2022

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Vitamin D supplementation and total cancer incidence and mortality by daily vs. infrequent large-bolus dosing strategies: a meta-analysis of randomised controlled trials

Br J Cancer . 2022 Jun 8. doi: 10.1038/s41416-022-01850-2 PDF can be rented for $9
N Keum 1 2, Q-Y Chen 3, D H Lee 4, J E Manson 5 6, E Giovannucci 4 6

Background: Efficacy of vitamin D supplementation may vary by dosing strategies and adiposity. To address such heterogeneity, we performed a meta-analysis of randomised controlled trials of vitamin D supplementation and total cancer outcomes.

Methods: PubMed and Embase were searched through January 2022. Summary relative risk (SRR) and 95% confidence interval (CI) were estimated using the DerSimonian-Laird random-effects model.

Results: For total cancer incidence (12 trials), the SRR for vitamin D supplementation vs. control group was 0.99 (95% CI, 0.94-1.03; P = 0.54; I2 = 0%). No significant association was observed regardless of whether the supplement was given daily or infrequently in a large-bolus. Yet, among trials testing daily supplementation, a significant inverse association was observed among normal-weight individuals (SRR, 0.76; 95% CI, 0.64-0.90; P = 0.001, I2 = 0%), but not among overweight or obese individuals (Pheterogeneity = 0.02). For total cancer mortality (six trials), the SRR was 0.92 (95% CI, 0.82-1.03; P = 0.17; I2 = 33%). A significant inverse association emerged (SRR, 0.87; 95% CI, 0.78-0.96; P = 0.007; I2 = 0%) among studies testing daily supplementations but not among studies that testing infrequent large-bolus supplementations (Pheterogeneity = 0.09).

Conclusions: For vitamin D supplementation, daily dosing, but not infrequent large-bolus dosing, reduced total cancer mortality. For total cancer incidence, bolus dosing did not reduce the risk and the benefits of daily dosing were limited to normal-weight individuals.

The weekly and obese dosing are hiding behind the paywall

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VitaminDWiki - Vitamin D: not one size, type, form, route for all - Jan 2022

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2X to 3X more Vitamin D is needed if obese

• Normal weight     Obese     (50 ng = 125 nanomole)

Click here for 2014 study

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VitaminDWiki Mortality pages with CANCER in title (34 as of July 2022)

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VitaminDWiki Meta-analysis pages with CANCER in title (72 as of July 2022)

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