Vitamin D has long been known to boost bone health. In recent years, it has gained a reputation as a cure-all supplement, with usage and testing growing rapidly. In the wake of COVID-19, proposed links with vitamin D levels and infection have further increased attention on the sunshine vitamin. In this month’s feature article, Rory O’Donnell and Naomi O’Farrell of totalhealth and Haven Pharmacies take a closer look at vitamin D benefits.