As temperatures begin to soar, many families will take part in a variety of outdoor activities like swimming, boating and hiking. If you plan on spending more than 10 minutes in the sun, it is recommended that you apply sunscreen to protect your skin from harmful ultraviolet (UV) radiation.
While making your summer plans, be sure to include a sunscreen that not only fits your lifestyle but also protects your skin from the damaging effects of the sun.
Choosing the right one
With so many sunscreens on the market now, it can be overwhelming trying to figure out which one to choose. Many sunscreens will include an expiration date to reference, but without an expiration date sunscreen can last no more than three years, according toCenters for Disease Control and Prevention. Try not to leave it sitting out though – that time can be much less if exposed to extreme temperatures.
“Look for a product containing broad-spectrum protection that blocks both types of UV radiation, UVA and UVB,” saidMark Gimbel, MD, surgical oncologist atBanner MD Anderson Cancer Centerin Gilbert. “A good sunblock is one that gives 100 percent protection and includes an active ingredient, such as titanium dioxide.”
An important component in deciding which sunscreen to use is the sun protection factor, or SPF. This number identifies the amount of time the sunscreen can prevent UVB from damaging the skin.
“我推荐防晒霜的SPF 30 sun-exposed areas of the body, especially the neck, face and ears,” Gimbel said.
However, the higher the SPF doesn’t necessarily mean more protection.
“An SPF 15 blocks 93 percent of the harmful UVB radiation while an SPF 30 blocks 97 percent, Gimbel added. “The added benefit of SPF 30 to SPF 50 is only 1 percent.”
Sunscreens come in a variety of sprays and lotions that are water resistant, kid-friendly and formulated for dry or sensitive skin. Experts suggest using caution when applying sunscreen on children—especially infants, who should wear sunscreen after the age of 6 months.
“Spray sunscreen on your hands first before rubbing on children to avoid the eyes and mouth,” Gimbel said.
Knowing when to reapply
It is suggested that one ounce of sunscreen should be applied 30 minutes before sun exposure to allow ingredients to fully bind and absorb into the skin, according toThe Skin Cancer Foundation.
Sunscreen’s impact lessens after a significant period of time outside – especially after swimming or excessive sweating. “Reapply every few hours,” said Gimbel. “Even water-resistant sunscreen needs to be reapplied because it usually gets wiped off with a towel.”
Don’t be fooled by hazy or overcast days.
“Approximately 40 percent of UV radiation can still make it through the clouds,” Gimbel added. “You still should wear sunscreen even on days when the sun isn’t out if you plan to be outside for any length of time.”
Be prepared
太阳起是最强大、最危险的感情n 10 a.m. and 4 p.m. Choose an indoor activity or seek shade under a tree or umbrella.
There are other unexpected ways the sun can cause harm.
“Be sure to wear sunscreen during activities like water skiing to avoid reflective radiation from the sun,” said Gimbel.
Polarized sunglasses canprotect the eyesand decrease chances for developing cataracts later in life. Brimmed hats, long sleeves and pants made from tightly woven materials and swim shirts are also suggested.
“Today there are plenty of lip balms and other cosmetics that contain SPF,” Gimel added.
Avoid long-term damage
The effects of sun exposure like wrinkling, freckling and brown spots are cumulative and not immediately noticeable. Sun damage occurs over an extended period, with the majority taking place during adolescence and early adulthood.
However, there are ways to make a positive impact on skin at any age.
Use sunscreen daily. Steer clear of indoor tanning which can increase chances forskin cancer. Seek other ways to obtain vitamin D through food sources.
“Even if someone starts using sunscreen regularly later in life, it still has beneficial effects,” Gimbel said.
This post has been updated. It was originally published on June 10, 2016.
