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What Is Physical Sunscreen? Plus, How It Compares To Other Forms

Hannah Frye
Author:
June 06, 2023
Hannah Frye
Beauty & Health Editor
By Hannah Frye
Beauty & Health Editor
Hannah Frye is the Beauty & Health Editor at mindbodygreen. She has a B.S. in journalism and a minor in women’s, gender, and queer studies from California Polytechnic State University, San Luis Obispo. Hannah has written across lifestyle sections including beauty, women’s health, mental health, sustainability, social media trends, and more. She previously worked for Almost 30, a top-rated health and wellness podcast. In her current role, Hannah reports on the latest beauty trends and innovations, women’s health research, brain health news, and plenty more.
Woman on The Beach Applying Sunscreen
Image by Kike Arnaiz / Stocksy
June 06, 2023

The mineral versus chemical sunscreen debate is nothing new. Every year when warmer weather finally appears, people tend to brush up on the difference between the two, many touting one as better than the other. 

While we typically lean toward mineral sunscreen formulas at mindbodygreen, the most important thing about sunscreen is that you wear it—period. But if you've recently heard the term physical sunscreen and raised a brow, we have you covered. Below, what you should know about the beauty term.

What is physical sunscreen? 

No, this isn't a new SPF mechanism—physical sunscreen is just another way to say mineral sunscreen. 

The descriptor makes sense, as mineral sunscreens manually block UV rays by creating a barrier on the skin (sort of like a physical shield). Think of them like a reflecting pane of glass: Some of the rays hit the SPF filters and bounce off, shielding the skin below from damage. 

Chemical sunscreens, on the other hand, work by absorbing the UV rays and triggering a chemical reaction, which then transforms the UV into heat.

But as author and chemist George Zaidan previously told mbg, mineral sunscreens also do some absorbing—just like their chemical counterparts. Essentially, they work in two ways: First by blocking some rays and second by absorbing the rays and deflecting their damage by turning it into heat.

At the moment, zinc oxide and titanium dioxide (both mineral, or physical, sunscreens) are the only two ingredients the Environmental Working Group has deemed safe for use and effective at protecting the skin from UV damage. 

As long as the minerals are non-nano (read: aren't broken down into smaller bits), they are deemed safe for oceans, as research shows they don't cause coral bleaching or affect marine life—another worthy perk.

However, mineral sunscreens have been known to leave a hefty white cast. That being said, there are plenty of sunscreen formulas on the market today with mineral ingredients as well as tints and oils to minimize a chalky appearance—here's a list of our current favorites if you're ready to stock up.

The takeaway

Physical sunscreen is just another word for mineral sunscreen. The term physical refers to the barrier that mineral SPF creates on the skin, reflecting rays to protect your complexion. To dive deeper into the difference between chemical and mineral formulas, check out this guide.

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