Vitamin D(éjà vu): new study, same old problems
For vitamin D supplementation to have any effect relative to placebo, it needs to be increasing the body’s supply of vitamin D, and if it doesn’t, then the treatment and placebo groups are effectively identical. So did the researchers achieve a difference in vitamin D levels over the course of the study?
Should BMI be used? Measuring obesity at the individual level
This video clip is taken from Podcast #197 — The science of obesity & how to improve nutritional epidemiology with David…