Cathy’s our resident Pharmacy Diva here at Drugstore Divas. She is a Graduated Intern Pharmacist, so she knows her stuff. But, even still, all the info in her posts are for reference and information only. If you’ve got a general question, ask her. If you’ve got something specific, you might wanna seek the advice of your own doc.
As I mentioned in part 1 that of the most important weapons against sun’s harmful effects is the application of sunscreens/sunblocks while out in the sun. But with the array of sunscreens/sunblocks on the drugstore shelves and unpronounceable chemicals contained in every bottle, do you really know what you are getting? Don’t worry, let me screen out the important FYIs and block out the false advertisements, so you can enjoy a fun outdoor summer while keeping your skin healthy.
Let’s start by deciphering those almost encrypted words and phrases on your sunscreen bottles. The most noticeable part of the sunscreen packaging other than the brand name is the SPF number, which stands for Sun Protection Factor number. SPF measures the product’s ability to screen out UVB ray only, and the number indicates the number of times longer it takes for you to get red than the time without sunscreen. For example, if you start getting red in 20 minutes under the sun without any sunscreen, then a sunscreen with SPF 30 allows you to stay in the sun for 600 minutes [[20 minutes x SPF 30]] before becoming red.
Following this logic, you may think SPF 60 is two times better and will last twice as long as SPF 30, but, again, more is not better. The FDA does not recommend products that offer SPF 30+, because the additional active ingredients in the products do not add much more protection … instead it can increase the cost and the potential adverse reactions of the product.
Are you drawn to sunscreens that claim to be “waterproof”? Did you know that is actually not a usable term on the label? The FDA does not endorse such claims, since no sunscreen is waterproof; the words “water resistant” or “very water resistant” are recommended. “Water resistant” means the product will stay on after 40 minutes of activity or water immersion, and “very water resistant” means the product will stay on after 80 minutes of activity or water immersion.
Now turn your sunscreen bottle over and look at the active ingredients; it’s composed of words that you probably cannot pronounce, but you don’t need to know how to pronounce them to know what they do for you. Sun protective agents are separated into two categories: physical blockers [[aka sunblock]] that reflect or scatter the sun’s UV rays, and chemical absorbers that absorb, filter, and reduce UVR penetration.
The two ingredients that act as physical blockers are titanium dioxide and zinc oxide. You are probably very familiar with what these products look like, because they are the white chalky material that’s on every lifeguard’s nose. The advantage of titanium dioxide and zinc oxide is that they are “broad spectrum,” covering both UVA and UVB, and they are safe. The drawbacks include that they appear colored [[newly formulated micronized titanium oxide and microfine zinc oxide solved this problem]] and they can occlude skin.
There are many chemicals that absorb and filter out the sun’s UV rays and they are not created equal.
Chemicals that protect against UVA only include:
- Anthranilate [[aka meradimate, menthyl anthranilate]]
- Dibenzoylmethanes [[aka Avobenzone, Parsol 1789]]
- Benzylidene derivatives [[aka Ecamsule]]
Chemicals that protect against UVB only include
- PABA
- Cinnamates [[aka octinoxate and octylmethoxycinnamate]]
- Salicylates [[aka octisalate]]
- Octocrylene
Chemical that protects against both UVA and VUB include:
- Benzophenons [[aka Oxybenzone, dioxybenzone]]>,/li>
Have I have confused, rather than clarified, you more about sunscreens? Let me sum it up for you.
- SPF only refers to the product’s ability to block out UVB rays, the UV ray that causes you to become red and eventually burn
- Use a “broad spectrum” sunscreen that filters or blocks out both UVA and UVB
- SPF 30 is sufficient for most sun protection, increased SPF may cost more money and side effects while may not offer much additional benefits
- Use “very water resistant” formulations if playing sport or in the water. Waterproof is actually not an allowable labeling of product, since all products will wear off and will need application
After picking out the best sunscreen, do you know to properly apply it? All the directions for these sunscreens say “apply generously/liberally,” but how much is generously/liberally?
The correct amount is 1 oz [[2 tablespoons!]] for adults. Apply 30 to 45 minutes before going in the sun and reapply at least every two hours. Use at least SPF 15 for adults and SPF 30 for children. It is recommended to add sunscreen into your daily facial regimen: apply over moisturizer but under your makeup. And don’t forget to apply to your eyelids, ears, nose, neck and back of legs, because the UV ray is ubiquitous and can burn you anywhere that’s unprotected.
Now that you are armed with the knowledge of how to choose the correct sunscreens/sunblocks and how to use them correctly, go out and enjoy the “sun-mer” while keep your skin looking as healthy and youthful as possible.
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