Rickets Disease In Dogs Pictures Why Is Rickets So Prevalent In The World Today?

Why is rickets so prevalent in the world today? - rickets disease in dogs pictures

Rickets is a disease caused by deficiency of vitamin D caused the rights? However, people are able to synthesize vitamin D from the sun. Now I read in the way that Russia can not get enough sun, and children must be under sunlamps. But overall, everyone goes to school or work, or to buy the church, or to eat at least. So, if everyone exposed to sunlight, allowing the body to produce vitamin D, why are so common is rickets?