The Science Behind Sunscreen
At UW Heath Transformations Jeune Skin Care, we offer some of the best sunscreens available with mexoryl and zinc oxide.
To find the best sunscreen for your skin type, we offer a complimentary skin evaluation with one of our licensed medical aestheticians. Please call (608) 836-9990 to set up your appointment.
Sunscreens are classified as physical or chemical. Most sunscreens contain both physical and chemical sunscreens in the form of a cream, lotion, gel or spray.
Physical sunscreens prevent ultraviolet (UV) rays from reaching the skin by reflecting and dispersing them, similar to a mirror effect. Zinc oxide and titanium dioxide are physical sunscreens.
Chemical sunscreens absorb UV rays in a way that prevents them from penetrating the skin. The degree of absorption depends on the substance used and its concentration. Chemical sunscreens include oxybenzone, octyl methoxycinnate, octylate salicylate, mexoryl and PABA. Most sunscreens today are PABA-free due to allergic reactions to PABA.
Learn more about sunscreen and protecting your skin:
- Two types of damaging UV rays reach the earth: UVA and UVB
UVA rays mainly cause aging, while UVB rays mainly cause burning. However, SPF (Sun Protection Factor) measures only UVB protection, not UVA protection.
- Up to 95% of the UV rays that reach the skin are UVA rays
- UVA rays exist from sunrise to sunset, even on cloudy days - unlike UVB rays
- UVA rays persist all year round, even in the winter - unlike UVB rays
- UVA rays pass through windows - unlike UVB rays
- UVA rays penetrate deeper into the dermis than UVB rays
While UVB rays remain primarily at the epidermis (top layer of the skin), UVA rays penetrate deeper into the dermis, causing DNA and collagen damage.
- UVA rays are linked to skin cancer
There is significant scientific evidence that UVA rays contribute to skin cancer by suppressing the immune system.
- Experts state that UVA rays cause about 80% of skin aging
Sun Protection Tips
- Do use a daily product with high UVA and UVB protection every day, even during the winter and on cloudy days
- Do be extremely careful to protect your skin from hyperpigmentation induced by UVA rays if you have had chemical peels or laser treatments, are taking oral contraceptives or are pregnant
- Do consult your dermatologist if you notice any change in color or shape of a mole, which can be an early sign of skin cancer
- Don't neglect the hands, chest, neck and ears. Skin aging of the hands and neck often reveals one's true age!
- Don't skimp when applying sunscreen. Most people don't use enough! Apply at least 15 minutes before UV exposure
- Don't forget that SPF only measures protection against UVB rays, and not UVA. Look for ingredients such as Zinc oxide and Mexoryl that offer high UVA protection.