Will using Dr Sam's sunscreen decrease my Vitamin D levels?Updated 8 months ago

You need exposure to UVB radiation in order to make Vitamin D, which we know is causally linked to skin cancer. It’s very difficult to advise exactly how much exposure to UVB is needed to make enough vitamin D safely without increasing someone’s risk of skin cancer. And some of us live in countries where there is almost no UVB in winter, making supplementation a necessity. My recommendation is that, given that you can get vitamin D from foods and vitamin supplements, this approach gives you the vitamin D you need without increasing your risk for skin cancer and premature skin ageing.