Cookies on our website Like nearly all websites we use cookies on our website to make our website work properly. You are free to manage this via your browser setting at any time. (More about Cookies.) To learn more about how we use the cookies, please see our privacy policy. Privacy OK - Carry on!Please Wait
Vitamin D3 is normally made by the action of sunlight on the skin. In more Northern coutnires such as Scotland, current research suggests taking supplemental D3 during winter months (e.g. September to March).
