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This Is How To Pick A Natural Sunscreen

Sarah Villafranco, M.D.
Author:
June 05, 2017
Sarah Villafranco, M.D.
Founder of Osmia Skincare
By Sarah Villafranco, M.D.
Founder of Osmia Skincare
Sarah Villafranco, M.D., is a natural skin care expert and practiced emergency medicine for 10 years. She received a B.A. from Georgetown University, and then went on to get her M.D. from Georgetown University School of Medicine.
Photo by Stocksy
June 05, 2017

The word organic is incredibly confusing in many situations, but especially when referring to sunscreen. Technically, an "organic" sunscreen is one that uses carbon-based chemicals, like oxybenzone, avobenzone, and octinoxate, to diminish the impact of ultraviolet radiation. That's what "organic chemistry" is all about—the study of molecules with carbon backbones and carbon-hydrogen bonds.

All this said, when regular people (as opposed to chemists) refer to organic sunscreens, they are usually talking about a barrier cream (zinc and/or titanium) that has fewer and healthier ingredients than a mainstream sunscreen you might find at the grocery store. A less confusing term would be "nontoxic sunscreen," as it implies that we are comparing a more environmentally aware product with a traditional sun-protection product.

Why should I choose an organic sunscreen over a traditional one?

Most widely available sunscreens contain not only sun protection chemicals but parabens, fragrance, phthalates, and multiple ethoxylated ingredients, as well as being packaged in an aerosolized can: That knowledge alone is a great reason for choosing a nontoxic sunscreen1 over a traditional brand.

What is a physical sunblock?

Zinc oxide and titanium dioxide are the two physical sunblocks used in the natural sunscreen industry. They are also referred to as barrier sunblocks. Rather than filtering the rays of the sun and diminishing the harmful effects of UV light (this is the action of a chemical sunscreen), a physical sunblock sits on top of the skin and reflects the sunlight. It’s like the difference between a filter and a mirror—the filter breaks up the sunlight and deactivates it, and the mirror reflects it instead. Nanoparticles complicate this issue because they do get absorbed by the skin cells to some degree, and more work needs to be done to find out if this could have detrimental effects. Some researchers believe that nanoparticles get taken into skin cells where they heat up and accelerate sun damage, but the evidence is not conclusive yet.

Is a barrier sunblock better than a chemical sunscreen?

This is a much-argued point, and there is not enough science out there to back any extreme position. There seems to be increasing evidence that oxybenzone, a very common chemical sunscreen, may act like estrogen in the body, which increases the likelihood that it will disrupt our innate hormone cycles. Another controversial chemical is retinyl palmitate, which can slow skin aging but may actually accelerate the development of certain skin cancers when it comes in contact with ultraviolet light. PABA is not used as much as it once was, but there’s a fairly large population of people who are allergic to that ingredient by now. In short, there are several really good arguments for using a non-nano physical sunscreen made with zinc oxide or titanium dioxide: They are not absorbed by the skin; they are not degraded by exposure to sunlight, making them more stable over time; and there are often fewer and less toxic ingredients that make up the "inactive" ingredients in the product. To sum it all up—what should you look for in a sunscreen?

Look for fewer ingredients overall, stick with non-nano zinc and titanium particles2 until we know more about the effects of nanoparticles, and look for a product with no parabens and no fragrance. (Even essential oils oxidize in sunlight, which can increase your chance of having a skin reaction to them.) An SPF of 30 is probably sufficient, and you should still be wearing hats and long sleeves whenever you’re not splashing in the water. Here are some of the natural sunscreens that made it to the EWG's list of approval this year. To check out the rest, head here.

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