Sunblock vs. Sunscreen: What’s the Difference?
Sunscreen filters UV rays by absorbing and converting them into heat, while sunblock physically reflects them using zinc or titanium oxide, making sunblock the stronger option for maximum protection. Look for a broad-spectrum product with at least SPF 30, and remember that sun protection goes beyond just what you apply since hats, umbrellas, and avoiding peak hours between 10 AM and 4 PM all make a difference.
What is the difference between sunscreen and sunblock?
Sunscreen and sunblock are two different forms of sun protection. While these terms are used interchangeably, sunscreen filters harmful ultraviolet rays (UV) whereas sunblock completely reflects them. Therefore, sunblock provides a greater degree of protection from the sun.
How can I tell the difference between sunscreen and sunblock?
With experience, you can tell whether your sun protection is sunscreen or sunblock just by looking at the texture of it. Usually, sunblock is thicker and harder to spread across your skin. It is also less translucent and often creates a “white cast” on your skin. The difference in texture is due to the addition of titanium or zinc oxide to most sunblocks, which is the primary active ingredient for blocking UV rays. Titanium and zinc oxide are not well absorbed by the dermis. Instead, they sit atop your skin to provide a physical barrier to sunlight, reflecting UV rays before they can even reach the deeper layers of your skin.
On the other hand, the primary active ingredients in sunscreen, including oxybenzone or avobenzone. These chemicals are more easily absorbed in the dermis, where it subsequently absorbs UV rays and dissipates them into less dangerous wavelengths of light or heat. However, this means that some UV rays are bound to make their way into your skin.
Which is better for sun protection?
Both sunscreen and sunblock are great products to prevent photoaging, sun damage, and wrinkles. However, if you are looking to get maximum sun protection, sunblock is the way to go. You can easily check the ingredients on the back of the product for zinc or titanium oxide. Also, you will want to go with a sunblock with an SPF of at least 30 (blocks 97% of UVB rays). Any SPF higher than that provides a marginal increase in sun protection.
Key features to look out for…
Aside from SPF, you should check if the sunscreen says “broad-spectrum” on the product label. This means that it protects against both UVA and UVB rays, which both cause sun damage. Also, water-resistant sunscreen is preferable for those who frequently sweat or engage in water-related activities. These sunscreens are usually effective for one to two hours in the water before reapplication is required.
Final words…
Sunblocks and sunscreens are only one form of sun protection. Wearing a hat and bringing an umbrella outdoors can also significantly reduce your risk of sun damage. In general, it is best to avoid going outdoors during peak sunlight hours, which falls between 10 AM and 4 PM. Beware that being inside does not necessarily guarantee that you are safe from the sun. Being near unblinded windows at home or in your car still exposes you to the sun’s harmful rays.
