Some of the many variants sold today promise to penetrate our gray matter, but biology isn’t in the habit of respecting marketing declarations. https://www.wired.com/story/magnesium-may-not-reach-your-brain-despite-supplement-label-promises/?utm_brand=wired-science&utm_campaign=aud-dev&utm_medium=social&utm_social-type=owned&utm_source=twitter-science