healthytraveller.co.uk
healthytraveller.co.uk
Sun tan creams use the Sun Protection Factor (SPF) system as a measure of their effectiveness. The SPF is defined as the ratio of the least amount of ultraviolet energy required to produce a minimal erythema on skin protected by sunscreen to the amount of energy needed to produce the same erythema on unprotected skin. This can sound confusing especially since a SPF15 will protect against 94% of UVBs (cancer causing) while SP30 blocks out 97% and the effect diminishes the higher you go. It is hardly worthwhile spending your hard earned money on the so called Total Blocks when a factor 15 cream will work just as well if applied correctly. In fact in Australia where two out of three people develop sun-related skin cancer during their life, the government does not permit SPFs of more than 15 because they know any extra effect is minimal with normal sunbathing.
UVA is much more important than was hitherto believed since it can also enhance the action of UVB. This type of radiation is responsible for the ageing and wrinkles of skin, is present all year round and causes damage deep in the skin. Some sun tan products show a star rating on the pack which is a measure of the effectiveness against this type of radiation. Four star products provide the most, and one star the least protection is essential that sun screens should offer protection against both forms of radiation. Choice of sun cream should be considered as only one factor in protection; others include your skin type, country you are in and the weather pattern. The important thing to remember about using any sunscreen remains liberal and frequent application.
Imperial Cancer Reasearch Fund
Website for the
tanning Industry