Chemical vs. Physical Sunscreen: Best Choice for Sun Protection?

Every single day starts with a sunshine, and even a dim light in winter time turns out to be essential for all living creatures in the planet. But despite its importance in our daily lives, we must be aware of the harmful effects sun exposure could have on our skin. Every bit of sunlight contains two types of ultraviolet waves, and we must be guarded against them because this type of radiation can potentially change the way our skin cells behave.

Ultraviolet radiation from the sun can cause not only sunburns, but also skin aging, wrinkles and skin cancer. It breaks down into UVA and UVB rays, which are slightly different from each other, but both can damage the DNA in our cells and turn them into cancer cells. There are many ways to protect ourselves from ultraviolet radiation. We can limit sun exposure and avoid the time of day with the strongest radiation, which is between 10 am and 4 pm. However, it is also important to use sunscreen regularly if we want to stay protected.

SPF protection and scar healing from surgery

Scar healing is yet another compelling reason to adopt sunscreens into our daily routine. All scar such as from breast augmentation, breast reduction, and tummy tucks needs to be protected from the sun’s harmful rays.  These new surgical scars are even more sensitive than the rest of your skin, and to achieve the best possible result, the application of sunscreens with SPF 30 or more is very important. When your new scar is exposed to the sun without protection it can change color, turning it brown.  Since these areas are especially sensitive, Dr. Beber recommends a physical sunscreen with a broad spectrum of protection (protecting you from both UVA and UVB). Reapplication is key especially if you’re sweating or rubbing it off accidentally.  

Chemical vs. Physical sunscreen

Choosing the right sunscreen for you would depend on your skin type, and when and how are you planning to use your sunscreen. There are two types, chemical and physical sunscreen, and they both have advantages and disadvantages. Physical sunscreen relies on mineral ingredients that physically deflect the ultraviolet rays. On the other hand, chemical sunscreen is based on organic compounds that absorb the UV rays and scatter them. 

Physical sunscreen also referred to as sun blocks uses mineral such as titanium dioxide and zinc oxide to block the harmful rays.  Physical sunscreen when applied stays on top of your skin and blocks the UV rays.  It is safe for babies and women who are pregnant.  Upon application, it immediately protects your skin.  Dr. Beber recommends physical sunscreen on new scars as it is less likely to be irritated.  Sensitive skin and rosacea skin would benefit from physical sunscreens.   Frequent reapplication is important as it can be rubbed off easily.  

Chemical sunscreens on the other hand contain chemical ingredients such as oxybenzone, octisalate, and avobenzone.  These compounds of ingredients change the UV rays into heat, scattering them from the skin.  Chemical sunscreens tend to be easier to apply and a small amount goes a long way.  One disadvantage of chemical sunscreens is their possible irritation factor. Care is needed when used on children, sensitive skin, and around the eyes.  Chemical sunscreen must be applied 20 minutes before exposure to the sun.  There are increased risk of chemical sunscreens blocking pores and causing more redness on one that already has sensitive skin.