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MYTH SPF 50 has the same effect as SPF 30

"What is important is that the ingredients contain a physical block such as zinc oxide or titanium oxide, which will deflect harmful rays—as opposed to a chemical block such as octinoxate, which absorbs rays. Both are sunblocks, but physical sunscreens provide better protection. Therefore, the ingredients are key—not necessarily the SPF number.

I suggest a broad spectrum SPF 30 and it should be reapplied every 1-2 hours; they’re changing laws now because one company’s 50 is another company’s 70—what’s key is that it is broad spectrum and you’re diligent about reapplying."

MYTH I can't get a sunburn if my clothes are covering my skin
"The sun's harmful rays can penetrate light clothing."
MYTH If I wear waterproof sunscreen I don't need to reapply
"Sunscreen should be reapplied after 15 or more minutes in the water, as well as frequent application every 2-3 hours if outdoors."
MYTH I never get sunburns so I don't need to wear sunscreen
"You are still at risk even if you don’t burn. A tan still indicates damage to your skin."
MYTH If it's cloudy outside I don't need to wear sunscreen
"The best way to protect your skin is to wear sunscreen every single day of the year. Choose a moisturizer and/or makeup with SPF to ensure that skin is protected. According to the Skin Cancer Foundation, up to 80 percent of the sun's UV rays can pass through clouds."
MYTH Sunscreen starts working as soon as I apply it
"Sunscreen should be applied at least a half an hour before sun exposure; I suggest putting it on after you shower so it fully absorbs before you go out into the sun."
MYTH Sunscreen is sunscreen, the brand and ingredients don't matter—they all get the job done

"You should look for an SPF that says 'broad spectrum' which means UVB and UVA coverage. SPF 30 or above is fine, I recommend La Roche-Posay.

Additionally, a product containing a physical block such as titanium oxide or zinc oxide is key."