Vitamin D? What is that? I know most of people know about vitamin D. Its mostly formed by UVB of sunlight to our skin, especially arm, hand and face. Some foods contain vitamin D too. Like eggs...Yes, eggs contain vitamin D inside and some fish also have vitamin D.
Vitamin D is very important for our bones. If we have vitamin D deficiency, our bones would be brittle and thin. And simple accident could break them.
I live in Kuwait with a lot of sunlight and sunny all year, especially in summer no doubt. But there is one thing that makes me wonder...many people here take vitamin D injection (yes vitamin D available as injection too. It's very painful, you can imagine someone inject oil to your muscle).
Why? Because most of them apply sunblock, thus preventing UVB to be absorbed and forming vitamin D. They are afraid to get skin cancer too.
And now I realize that most of people in the world apply sunblock before they go out under sunlight. The higher sunblock sun protection factor (SPF), the longer UVB prevented to reach our skin.
So what should we do? To apply sunblock will prevent cancer, to not apply sunblock will prevent vitamin D formation.
I think we should let our skin free of sunblock every other day.
What do you think?