I was interested to read a report recently regarding a recommendation coming out of the Skin Cancer Foundation in the United States. The foundation has recommended that adults increase their daily intake of vitamin D from 400 IU (the recommended daily amount) to 1,000 IU.
This is good news because there’s abundant evidence that vitamin D deficiency is common. Such a deficiency here may increase the risk of many ailments including cardiovascular disease, bone disease, multiple sclerosis, and different forms of cancer.
Upping our intake of vitamin D could well help to protect against these conditions and will almost certainly improve general health and well-being.
The Skin Cancer Foundation has made a useful recommendation, but some could argue that this organization is, to some degree, responsible for the fact that vitamin deficiency is so common.
The organization recommends, not surprisingly, that we be wary of the sun, and that we all use sunscreen of at least sun protection factor (SPF) 15.
From the Foundation’s Web site: “Since its inception in 1979, The Skin Cancer Foundation has always recommended using a sunscreen with an SPF 15 or higher as one important part of a complete sun protection regimen. Sunscreen alone is not enough, however. Read our full list of skin cancer prevention tips:
· Seek the shade, especially between 10 a.m. and 4 p.m.
· Do not burn.
· Avoid tanning and UV tanning booths.
· Use a sunscreen with an SPF of 15 or higher every day.
· Apply 1 ounce (2 tablespoons) of sunscreen to your entire body 30 minutes before going outside. Reapply every two hours.
· Cover up with clothing, including a broad-brimmed hat and UV-blocking sunglasses.”
While there is some justification for this advice, it is obviously skin-focused. And what this sort of advice can neglect are the profound benefits sunlight exposure can have on general health.
While The Skin Cancer Foundation is clearly aware of the fact that vitamin D is important, it recommends that we get this through diet and supplements. The likelihood is that these recommendations will still leave many individuals short on vitamin D, especially in the winter.
While I am not against supplementation (I am currently taking 3,000 IU of vitamin D again myself), I suspect that shying away from the sun and slavering ourselves in sunscreen will almost certainly jeopardize our chances of enjoying optimal levels of vitamin D.
And the risk here is that what might be good for our skin, may have profound negative consequences for other aspects of our health.
Early in 2008, I reported on a study that weighed the pros and cons of sun exposure regarding cancer risk. This study estimated that for each life saved as a result of reduced sunlight exposure (and reduced risk of melanoma), about 10 other lives would be lost as a result of an increased risk of other forms of cancer.
The authors of this study suggested, “Increased sun exposure may lead to improved cancer prognosis and, [it’s] possible, give more positive than adverse effects on health.”
On top of this, we need to remember that vitamin D and sunlight exposure have been linked with reduced risk of many other conditions, including diabetes and cardiovascular disease.
Overall, while I welcome The Skin Cancer Foundation’s call for increased vitamin D intake, I also believe that the advice it gives regarding sun exposure is likely to be doing more harm than good.
Dr. John Briffa is a London-based physician and health writer with an interest in nutrition and natural medicine. His Web site is drbriffa.com
