Vitamin D - Health Professional Fact Sheet
ods.od.nih.gov › factsheets › vitamind-healthThe largest clinical trial, VITAL, to investigate the effects of vitamin D supplementation on the primary prevention of cancer in the general population gave 50 mcg (2,000 IU)/day vitamin D 3 supplements with or without 1,000 mg/day marine omega-3 fatty acids or a placebo for a median of 5.3 years . The study included 25,871 men aged 50 years and older and women aged 55 years and older who had no history of cancer, and most had adequate serum 25(OH)D levels at baseline.
Vitamin D and COVID-19: An Overview of Recent Evidence
www.ncbi.nlm.nih.gov › pmc › articlesSep 29, 2021 · Despite this critical role, the prevalence of vitamin D deficiency remains widespread, with 25-hydroxyvitamin D (25(OH)D) levels below 50 nmol/L (the common threshold for defining vitamin D deficiency ) affecting approximately 25% of US and Australian populations, as well as nearly 40% of Canadian and European populations [40,41]. These deficiency rates are largely attributed to the rising prevalence of obesity and sedentary indoor lifestyles, as well as sunscreen use and sun avoidance from ...