A large majority of dark-skinned people living in northern climates have low Vitamin D levels.

Studies show that in countries like the UK and the northern US, a massive percentage of Black and South Asian residents do not have enough Vitamin D in their blood. Our modern lifestyles do not help. We spend most of our time indoors under artificial lights. Combine indoor living with a natural skin shield and weak northern sunlight, and you get a recipe for widespread vitamin shortage.