Vitamin D, or the “sunshine vitamin”, is essential for your bones and immune system but it can also boost your brain health, numerous studies suggest. Researchers reached this conclusion in part by investigating the negative effects of vitamin D deficiency. A first-of-its-kind study published in The American Journal of Clinical Nutrition suggests that low vitamin D levels is associated with reduced brain volumes. The University of South Australia-led study involving over 295,000 genetic profiles in the UK Biobank also suggests correcting vitamin D deficiency could prevent as many as 17 percent…