Good catch and a good reason to be suspicious. The D-Health study in Austrialia will be done in a couple of years and is a similar size just looking at vitamin

Good catch and a good reason to be suspicious. The D-Health study in Austrialia will be done in a couple of years and is a similar size just looking at vitamin D, so we can see then if the results match. That is a large monthly dose so not exactly the same thing. Also, vitamin D studies seem to very often get contradictory results and I don't know if the reasons for that have been figured out. Not directly related to this study, but one oddity with vitamin D for anyone who had done testing is that the most common tests undercount D2 and fortified products and many supplements use D2. Establishing an Accuracy Basis for the Vitamin D External Quality Assessment Scheme (DEQAS). Burdette et al. 2017. [pdf] http://www.ingentaconnect.com/contentone/aoac/jaoac/2017/00000100/00000005/art00008?crawler=true&mimetype=application/pdf http://www.ingentaconnect.com/contentone/aoac/jaoac/2017/000...