Vitamin D hit the headlines last week following the publication of a new review that revealed the supplements of the so-called sunshine vitamin can help to reduce the risk of colds and flu.  While the benefits of vitamin D for bone and muscle health are indisputable, could supplements potentially ward off the winter sniffles as well?   What is vitamin D? Rather than a true vitamin, vitamin D is actually a pro-hormone.  When it is converted to its active form in the liver and kidney, it acts as a hormone to regulate the levels of calcium and phosphorus in the body.  Both these minerals are important in keeping bones healthy and calcium also plays a role in muscle contraction, so […]