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Less sun better than using sunscreen

With the northern hemisphere summer approaching, many people will be taking advantage of the hot weather to sunbathe and relax in the hot weather in parks and on beaches.

But avoiding direct sunlight and wearing clothes which stop harmful UV rays from reaching the skin, rather than sunscreen, are the best ways of avoiding skin cancer and the aging effects of the sun. This timely advice forms part of a Review published early Online and in an upcoming edition of the Lancet.

Dr Stephan Lautenschlager, Outpatient Clinic of Dermatology, Triemli Hospital, Zurich, Switzerland, and colleagues carried out the comprehensive review on sun protection strategies around the world.

The authors say: "Wearing sun protective clothes and a hat and reducing sun exposure to a minimum should be preferred to sunscreens. Often this solution is deemed to be unacceptable in our global, outdoor society, and sunscreens could become the predominant mode of sun protection for various societal reasons, for example healthiness of a tan, relaxation in the sun."

They add: "Nevertheless, sunscreens should not be abused in an attempt to increase time in the sun to a maximum."

The Review highlights the characteristics of clothing that can make all the difference in terms of sun protection factor (SPF). Tightly woven, thick garments made of denim, wool or polyester offer the best protection, while cotton, linen and acetate are much less effective. Lax, dry material, and clothes that have shrunk after washing (thereby making them denser) are better at stopping harmful UV rays reaching the skin, while wet or stretched materials, and those that have been bleached, are not so good.

Sunscreen of varying SPFs is applied, depending on skin type and personal preference - but what does SPF actually mean? SPF is defined as the minimum sun radiation dose (mainly UVB) required to produce sunburn after application of 2mg per square centimetre, divided
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Contact: Stephan Lautenschalger
stephan.lautenschlager@triemli.stzh.ch
41-442-988-920
Lancet
2-May-2007


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