Vitamin D is regarded as an extremely important health-sustaining factor because apart from being a vitamin it works as a hormone which can influence thousands of different human genes and cells. The active form of vitamin D is one of the most potent hormones in human body. We now know that it regulates more genes and bodily functions than any other hormone yet discovered! Recent studies suggest that maintaining our vitamin D levels at around 50ng/ml to 80ng/ml may have incredible health benefits relating to fat metabolism, immunity, viral infections, respiratory health, bone health, cardio-vascular health, blood glucose levels and both types of diabetes, hormonal balance, athletic performance, skin health, mood, joint health, ageing, migraines, sleep, and many other aspects of health and various conditions.