BEAUTY Test Your IQ JENNIFER LINDER, MD

Sunscreen is an essential part of any Part II: ACTIVE INGREDIENTS 10 When stored properly, sunscreen should sun protection program. And the more last for how long after the manufacturing you know about how sunscreen works 4 How many sunscreen ingredients are date stamped on the package? and its proper application and use, the currently available in the US? a. 9 months better you’ll be able to protect your skin. a. 12 b. 1 year Take this quiz now and find out your b. 15 c. 2 years sunscreen IQ. c. 17

Part I: SPF 5 Sunscreen ingredients fall into two For more information on , broad categories, inorganic/physical including products bearing our Seal of 1 A sunscreen’s SPF, which stands for and organic/chemical. The two inorganic Recommendation: www.skincancer.org/ Sun Protection Factor, measures protec- ingredients are: seal-of-recommendation. tion against the sun’s B (UVB) a. and radiation. SPF numbers indicate b. Cinoxate and Dr. Linder is a dermatologist and Mohs a. How long the skin will take to surgeon in private practice in Scottsdale, c. Titanium dioxide and zinc oxide redden in the sun when using the AZ, and a clinical instructor in skin cancer sunscreen, compared to how long surgery and the use of cosmetic injectables the skin would take to redden Part III: SUNSCREEN USE at The University of California, San Francisco, BASF without sunscreen Department of Dermatology. b. The percentage of active ingredients 6 Doctors recommend applying one ounce in the sunscreen (two tablespoons) of sunscreen to the body c. The number of hours you can stay 30 minutes prior to sun exposure, and out in the sun then again a. After one hour outside 2 A sunscreen with an SPF of 15 protects b. After one hour outside on against approximately 93 percent of the sunny days sun’s UVB rays. A sunscreen with an SPF c. After two hours outside 30 protects against a. 93 percent of the sun’s UVB rays, 7 Because children have delicate skin, and 93 percent of the sun’s UVA rays sunscreen should not be used on babies b. 97 percent of the sun’s UVB rays a. Under three months c. 100 percent of the sun’s UVB rays b. Under six months c. Under one year 3 If you apply a sunscreen with an SPF of 20, and then apply another sunscreen 8 For a sunscreen to provide adequate with an SPF of 30, what is the total value UVA spectrum protection, it must include of the SPF you’ve applied? one or more of the following ingredients: a. SPF 25 a. , octinoxate, PABA, b. SPF 30 octisalate c. SPF 50 b. , titanium dioxide, zinc oxide, (MexorylTM)

c. cinoxate, , ,

Padimate O

9 Water-resistant sunscreen:

a. Has to be reapplied after 40 minutes in the water b. Has to be reapplied after 90 minutes

in the water Answers

10=c 9=a; 8=b 7=b 6=c; 5=c; 4=c 3=b; 2=b;

c. Does not need to be reapplied 1=a;

30 SKIN C A N C E R FOUNDATION J O U R N A L