Effects of Exercise Alone or Combined With Cognitive Training and Vitamin D Supplementation to Improve Cognition in Adults With Mild Cognitive Impairment: A Randomized Clinical Trial – JAMA Network Open
RCT: Oral Vitamin D supplementation (60.000 IU per month) did not reduce mortality in patients 60 years or older (unscreened individuals in Australia, many without insufficiency, average 30ng/mL). Exploratory analyses pointed towards an increased risk of death from cancer.
USPSTF Draft Statement: Insufficient evidence to recommend multivitamin supplements for the prevention of CVD or cancer. The statement also recommends against the use of beta-carotene (increases risk of CVD mortality and lung cancer) or vitamin E (clear evidence of no benefit)