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Q. What does the number refer to on the sunscreen bottle?
A. It measures the UVB protection. A higher number gives you more protection against sunburn.

Q. What is the difference between UVA and UVB rays?
A. These represent different portions of the ultraviolet spectrum. Both can contribute to skin damage resulting in increased risk of skin cancer and accelerates aging of the skin.

Q. How much sunscreen should be applied for the entire body?
A. One ounce per application, which is about the size of a golf ball.

Q. When should sunscreen be applied and reapplied?
A. Sunscreen should be applied 20-30 minutes prior to sun exposure and reapplied every 2-3 hours. It should be applied more frequently when swimming, perspiring or when rubbing the skin such as with towel drying.

Q. How does UVA damage the skin?
A. It damages collagen and elastin fibers which advances skin aging.

Q. What is the difference between a chemical and physical sunscreen?
A. Chemical sunscreens absorb and dissipate the ultraviolet energy while physical sunscreens reflect the energy. Both must be reapplied.

Q. What are the most common ingredients in a physical sunscreen?
A. Titanium dioxide and zinc oxide which protect against both UVA and UVB rays.

Q.  Are powdered mineral sunscreens as effective as traditional sunscreens?
A. Yes, they are very effective and are good for sensitive skin conditions such as rosacea and acne.

Q. Are tanning beds safe?
A. No, UVA radiation makes up most of the radiation in tanning beds. Exposure to UVA radiation is associated with skin cancer and results in premature skin aging.

Q. What should I look for in an over the counter sunscreen?
A. An SPF rating around 30-45, broad-spectrum, photostabilized UVA protection.

Towne Center for Dermotology

1750 tree boulevard, ste 1 | saint augustine, fl 32084
904.824.4005 [tel] | 904.824.4009 [fax]

monday thru friday 8am to 5pm
if unable to keep appointment, kindly give 24 hours notice


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