Sunscreen & Vitamin D

We are lead to believe that sun exposure must be combated with sunscreen agents, and yet sunscreen may offer little protection to your skin from Melanoma, the deadliest of skin cancers.

Therefore it may seem wise to just avoid the sun all together. However, appropriate sun-light actually prevents cancer. An examination of 506 regions found a close inverse correlation between cancer mortality and levels of ultraviolet B light. The likeliest mechanism for a protective effect of sunlight is vitamin D, which is synthesized by the body in the presence of ultraviolet B. There are 13 malignancies that show this inverse correlation, mostly reproductive and digestive cancers. The strongest inverse correlation is with breast, colon, and ovarian cancer. Other cancers apparently affected by sunlight include tumors of the bladder, uterus, esophagus, rectum, and stomach.

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Sunscreen ingredients themselves have come under scrutiny because of their risk in promoting Cancer. A study in the April 2004 Journal of Chromatography found that there was significant penetration into the skin of all sunscreen agents they studied. Additionally, potentially harmful chemicals such as dioxybenzone and oxybenzone, found in some sunscreens, are some of the most powerful free radical generators known to man. Furthermore, authorities have suggested that whereas sunscreen may prevent sunburn, they may fail to actually protect against cancer because most sunscreens only screen out UVB, which makes vitamin D, not the UVA that causes most of the damage.

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Sunscreen & Vitamin D Robert C. Scott, DC CCSP As summer …

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