A new report issued by the consumer protection organization Environmental Working Group (EWG) reveals that many popular sunscreens contain ingredients known to spur the growth and spread of skin cancer cells, which defeats their stated purpose of preventing skin cancer.
Vitamin D Helps Protect You Against Cancer
Vitamin D is a steroid hormone that influences virtually every cell in your body, and is easily one of nature's most potent cancer fighters. So I want to stress again that if you are shunning all sun exposure, you are missing out on this natural cancer protection.
Your organs can convert the vitamin D in your bloodstream into calcitriol, which is the hormonal or activated version of vitamin D. Your organs then use it to repair damage, including damage from cancer cells and tumors. Vitamin D's protective effect against cancer works in multiple ways, including:
Increasing the self-destruction of mutated cells (which, if allowed to replicate, could lead to cancer)
Reducing the spread and reproduction of cancer cells
Causing cells to become differentiated (cancer cells often lack differentiation)
Reducing the growth of new blood vessels from pre-existing ones, which is a step in the transition of dormant tumors turning cancerous.