As most of us are now preparing for summer holiday, here some useful advice from PJ Cousin, author of “Natural Recipe for a perfect skin” and Director of Cure By Nature in Replingham Road
Some exposure to sunlight is obviously beneficial, by stimulating the production of vitamin D, a substance essential for the formation and maintenance of healthy bones, but regular, prolonged sunbathing and exposure to ultraviolet rays is terribly destructive.The dangers have increased considerably in reecent years, due to destruction of the ozone layer in the upper part of the atmosphere.
There are two type of Ultraviolet rays. UVB rays short-wave burn the two outer layers of the skin. Only 10% of the UVB rays reach the Dermis; but these dangerous rays act upon the all important collagen-elastin structure causing its rapid dissociation, and a significant loss of skin elasticity.
Strongest at low latitudes and high altitudes UVA long-wave ray penetrate deeper into the skin, weakening the skin's inner tissue and contributing even more to aging, wrinkling, and loss of elasticity. Although UVB Rays are considered responsible for sunburns and most skin cancers- more than 90% of the skin cancers in the United States are attributed to UVB exposure- UVA rays penetrates the skin deeper than UVB rays and may cause deeper damage that can lead to skin cancer, `
Almost all sunscreens protect against UVB rays, but nothing is available to screen out all UVA rays. Even sunscreens offering a high Sun Protection Factor (SPF), your skin is still vulnerable to damage from UVA rays. SPF is a standardized measurement of a sunscreen's ability to protect the skin and prevent sunburn. Some researchers estimate that sunscreens advertising UVA protection are actually offering protection equal to only SPF 3 or 4 for the UVA rays, even though the SPF is shown to be higher for UVB rays).
Having a tan is little protection from skin damage because it provides protection equal to an SPF of 2. To be on the safe side , always reduce by half the stated protection of any product. A cream labelled as Factor 10, for certain type of skin and in particular external conditions ( wind, dilution of cream by salted water, heavy perspiration etc...) offer only a Factor 5 protection. Be aware also that US sunscreen have a Sun Protection Factor lower the european equivalent
You can establish quickly with the following table your phototype, and how much tan is safe for you:
Even within the same skin type, people may burn at different rates. You should decide if you are more or less sensitive to sun exposure and take protective actions accordingly.
Basic precautions:
Minimize sun exposure at midday (10:00 a.m. to 3:00 p.m.)
Apply a sunscreen with SPF-15 or higher to all exposed areas of the body.
Reapply sunscreen every two hours, even on cloudy days. Also, reapply after swimming or perspiring.
Wear clothing that covers the body and shades the face.
Avoid unnecessary exposure to radiation through sunlamps or tanning parlors.
Prevention and Protection: choosing a sunscreen
When choosing sunscreen, follow the guidelines in the phototypes table for minimum Sun Protection.
Always remember, even if sunscreens have high SPF, they don't protect you from UVA rays.
Choosing a sunscreens for holidays:
People going on holidays in high altitudes, or to a sea resort, need higher sunscreens with higher SPF. Different complexions require different degrees of protection:
Fair Skin SPF 30
Medium Skin SPF 30, followed by SPF 20 in a few days
Dark Skin SPF 15 with SPF 20 on shoulders and face
Remember, even sunscreens with high SPF numbers provide less than full protection.
For full protection use sunblock.
Extract from "Natural recipes for a perfect skin" by PJ Cousin
Acupuncture at Cure By Nature: clinics at 95 Repligham Road london SW18 5LU and 211-213 kensington High Street London W8 6BD