What is sun protection?
Sun protection is simply guarding a body from the adverse effects of sunlight. Aside from the hazards of heat, the sun poses the danger of sunburn, which can permanently damage the skin and cause skin cancer, precancerous changes in the skin, as well as premature wrinkling and signs of aging. Exposure to ultraviolet rays from the sun is a known risk factor for the development of both melanoma and nonmelanoma skin cancers.
What is sunscreen?
Sunscreen is any substance or material that protects the skin from UV radiation. Sunscreens are available in the forms of topical lotion, cream, ointment, gel, or spray that can be applied to the skin; a salve or stick that can be applied to the lips, nose, and eyelids; a moistener in towelettes that can be rubbed against the skin; sunglasses that protect the eyes; certain types of sun-protection clothing; and film screen that can be affixed to the windows of a car, room, or office. Many facial moisturizers and cosmetics products also offer some degree of sun protection.
While choosing the best sunscreen is important, perhaps even more crucial is using it correctly — something a lot of us don’t do.
here are the sunscreen facts.
Finding the Best Sunscreen.
Sunscreens help shield you from the sun’s dangerous ultraviolet (UV) rays in two ways.
▪️Some work by scattering the light, reflecting it away from your body.
▪️Others absorb the UV rays before they reach your skin.A few years ago, choosing a good sunscreen meant you just looked for a high sun protection factor (SPF) — which rates how well the sunscreen protects against one type of cancer-causing UV ray, ultraviolet B (UVB.) “SPF refers to blockage of UVB rays only,” .
Research soon showed that ultraviolet A rays (UVA) also increase skin cancer risk. While UVA rays don’t cause sunburn, they penetrate deeply into skin and cause wrinkles. The Environmental Protection Agency estimates that up to 90% of skin changes associated with aging are really caused by a lifetime’s exposure to UVA rays.
The New Broad-Spectrum Sunscreens.
So which is the best sunscreen for you? Clearly, you’ll want a sunscreen with broad-spectrum or multi-spectrum protection for both UVB and UVA.
Ingredients with broad-spectrum protection include benzophenones (oxybenzone), cinnamates (octylmethyl cinnamate and cinoxate), sulisobenzone, salicylates, titanium dioxide, zinc oxide, avobenzone (Parsol 1789) and ecamsule (Mexoryl SX).
▪️ SPF 15 or higher for UVB protection.
The SPF factor rates how effective the sunscreen is in preventing sunburn caused by UVB rays. If you’d normally burn in 10 minutes, SPF 15 multiplies that by a factor of 15, meaning you could go 150 minutes before burning.
For the vast majority of people, SPF 15 is fine, Leffell tells WebMD. But people who have very fair skin, a family history of skin cancer, or conditions like lupus that increase sensitivity to sunlight should consider SPF 30 or higher.Keep in mind that the higher the SPF, the smaller the increased benefit: contrary to what you might think, SPF 30 isn’t twice as strong as SPF 15. While SPF 15 filters out 93% of UVB, SPF 30 filters out 97%, only a slight improvement.
▪️ UVA protection.
There is no rating to tell you how good a sunscreen is at blocking UVA rays. So when it comes to UVA protection, you need to pay attention to the ingredients.
Look for a sunscreen that contains at least one of the following:
ecamsule, avobenzone, oxybenzone, titanium dioxide, sulisobenzone, or zinc oxide. Any of those should do the trick.
▪️ Water and sweat resistance.
If you’re going to be exercising or in the water, it’s worth getting a sunscreen resistant to water and sweat.
But understand what this really means. The FDA defines water resistant sunscreen as meaning that the SPF level stays effective after 40 minutes in the water. Very water resistant means it holds after 80 minutes of swimming. These sunscreens are in no way water-proof, so you’ll need to reapply them regularly if you’re taking a dip.
▪️ Kid-friendly sunscreen.
The sensitive skin of babies and children is easily irritated by chemicals in adult sunscreens, so avoid sunscreens with para-aminobenzoic acid (PABA) and benzephenones like dioxybenzone, oxybenzone, or sulisobenzone. Children’s sunscreens use ingredients less likely to irritate the skin, like titanium dioxide and zinc oxide. Unlike chemical ingredients, these protect babies’ skin without being absorbed.
▪️ Sunscreen for skin problems or allergies.
People who have sensitive skin or skin conditions like rosacea may also benefit from using sunscreens designed for children. Go for titanium dioxide or zinc oxide instead of chemicals like para-aminobenzoic acid (PABA), dioxybenzone, oxybenzone, or sulisobenzone. If you have skin irritation or allergies, avoid sunscreens with alcohol, fragrances, or preservatives.
How to Wear Sunscreen.
While choosing the right sunscreen is important, it won’t help much if you don’t use it daily and correctly. Use these tips from the experts.
▪️ Apply the sunscreen 15 to 30 minutes before you go out in the sun. For woman, sunscreen can be applied under makeup. Use about 1 ounce (or 2 tablespoons) to cover your whole body. Don’t skimp. A number of studies show that people simply don’t use enough — and only get 10% to 25% of the benefit.
▪️Don’t forget the easy-to-miss spots, like the tips of your ears, your feet, the back of your legs, and, if you have one, your bald spot. Since your lips can also get sunburned, use a UV-protective lip balm and reapply it regularly.
▪️ No matter how long-lasting it’s supposed to be, reapply sunscreen at least every 2 hours, and more often if you’re sweating or getting wet.
▪️ Pay attention to the expiration date on the bottle. Sunscreen loses its effectiveness over time.
▪️Wear sunscreen whenever you’re out during the day — and not only when it’s hot and sunny. On a grey, overcast day, up to 80% of the dangerous UV rays still make it through the clouds. And during the winter, exposure to the sun’s rays still can have damaging effects on your skin.
Sunscreen Isn’t Enough.
Some people have the impression that wearing sunscreen makes them fully protected against the sun’s rays. But that’s not the case. No sunscreen can do that.
No matter how high the SPF, no matter how thickly you slather it on, sunscreen will never fully protect you, experts say. This misunderstanding can be dangerous: people who think they’re safe wind up spending too much time in the sun and raise their risk of skin cancer and other problems.So in addition to wearing good sunscreen, you still need to take other precautions:
▪️ Stay in the shade when possible.
▪️Stay inside when UV radiation levels are highest, usually from 10 a.m. to 4 p.m.
▪️Wear a broad-brimmed hat.
▪️Wear sun-protective clothing, preferably with a UVP (ultraviolet protection rating) on the label.At least wear clothes that are dark and tightly woven, which offer a bit more protection.
R. Morgan Griffin, “What’s the Best Sunscreen?”، webmd
Melissa Conrad Stöppler, MD , “Sun Protection and Sunscreens”، medicinenet