Did you know that there are five different types of Vitamin D? There's D1, D2, D3, D4, and D5, but D2 and D3 are the only types that our bodies can use. So, when something just says "vitamin D" it is generally referring to D2 or D3 (or a combination of the two). Even more impressive, Vitamin D is one of the only vitamins that your body can produce by itself. What is the catalyst that gets your D production going? Good old-fashioned sunshine! It's the ultraviolet-B radiation (UVB) that […]