Sunscreens, Cancer in a Bottle?

Most people use sunscreens to avoid the harmful effects of the sun on the skin.  Indeed prolonged sun exposure can actually induce the early appearance of freckles and wrinkles.  But a study published in the British Medical Journal reports that sunbathers who use sunscreens with higher SPF have a higher risk of developing skin cancers.  This is because a chemical called Oxybenzone which is a standard ingredient in high SPF sunscreens can cause more harm than good.

Oxybenzone’s job is to filter ultra violet light on the surface of the skin, converting it from light to heat.  Once heat is absorbed in the skin, it has the potential to damage cells.  Once light is converted into heat, it can cause basal damage to growing cells which causes malignancy in growth and cause cancer.  Scientists at the Memorial Sloan Cancer Center in New York say that sunscreens are very effective in preventing sunburns and cancers like Carcinoma but not against Melanoma.

PABA or para-benzoic amino acid which works in the same way as Oxybenzone also has similar effects.  For sunbathers and sun worshipers it would probably be better to use the old and tried tested method of applying tin oxide which reflects the sun’s rays rather than absorbing it.  It is also widely used in wound dressings and is safe.  Calamine lotion which has a Zinc oxide base is colored pink and washes off easily can also be used as a substitute for PABA or Oxybenzone based sunscreens.

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