SUNSCREEN – Can Too Much Be Bad For You?
Just in time for summer comes news that excessive use of high-SPF sunscreen lotions can impede our body’s supply of a vital nutrient – vitamin D.
And having too little vitamin D is a serious issue. Not only is it essential for building stronger muscles and improving reaction time (Any athletes out there?) but deficiencies in vitamin D have been linked to everything from osteoporosis to heart disease.
Unfortunately, there is virtually no vitamin D in our diet – you’d have to eat seven pounds of salmon every day for your daily requirement - so the best source is the sun. (UV rays trigger our body to produce vitamin D naturally.)
But, if you’re coating yourself in high-SPF sunscreen lotion, those UV rays aren’t getting through. So you’ve either got to take supplements, or, as the American and Canadian Cancer Societies now suggest, consider getting small amounts of sun exposure.
Naturally, your doctor and personal situation will determine the best course of action for you, but you might want to heed the advice of Dr. Robyn Lucas (MD, PhD) who says, “… short sun exposure of more skin is a lot safer than longer exposure of just your face and hands.”
And if you choose the sun-tanning route as your source of vitamin D, remember, you don’t need a lot: you can get almost a year’s supply of vitamin D by exposing 40% of your skin to the summer summer sun for just 3-10 minutes twice a week.
See you on the beach! (For just a few minutes
)
Van
(For more, see National Geographic Adventure, June/July 2009, “The Sun Rx” by Kate Rope)
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