Surprising things you didn’t know about your sunscreen

Surprising things you didn't know about your sunscreen

Sunscreen is a staple in our daily skincare routine, protecting our skin from the harmful effects of UV radiation. However, beyond its apparent sun-blocking abilities, there are several surprising aspects and lesser-known facts about sunscreen that many people may not be aware of. In this article, we delve into some intriguing details about your sunscreen that might just change the way you view this essential skincare product.

Surprising things you didn’t know about your sunscreen

1) Expiration Dates Matter:

Most people don’t realize that sunscreen has a shelf life. The active ingredients in sunscreen can lose their effectiveness over time. Always check the expiration date on your sunscreen bottle, and if it’s past its prime, it’s time to invest in a new one for optimal protection.

2) Apply Indoors, Too:

Sunscreen isn’t just for outdoor activities. UV rays can penetrate windows, putting you at risk even when you’re indoors. If you spend a significant amount of time near windows or in a car, applying sunscreen can provide added protection against these sneaky rays.

3) Water-Resistant Doesn’t Mean Waterproof:

While many sunscreens claim to be water-resistant, it’s essential to understand that no sunscreen is entirely waterproof. Water-resistant sunscreens provide protection for a specific amount of time in water before reapplication is necessary. Be sure to follow the product’s instructions for the best results.

4) SPF Isn’t a Linear Scale:

The Sun Protection Factor (SPF) on your sunscreen doesn’t follow a linear scale. An SPF 30 doesn’t provide twice the protection of SPF 15. SPF 15 filters out about 93% of UVB rays, while SPF 30 filters out around 97%. The higher the SPF, the smaller the incremental increase in protection.

5) Sunscreen Isn’t Just for Your Face:

While facial sunscreen is a common addition to beauty routines, don’t forget to apply sunscreen to often neglected areas such as your neck, ears, hands, and the tops of your feet. These areas are just as susceptible to sun damage and premature aging.

6) Chemical vs. Physical Sunscreens:

Sunscreens can be broadly categorized into chemical and physical (mineral) formulations. Chemical sunscreens absorb UV rays, while physical sunscreens reflect them. Knowing the difference can help you choose a sunscreen that aligns with your preferences and skin type.

7) Sunscreen Isn’t Just for Summer:

Sun protection is a year-round necessity, not just a summer essential. UV rays are present even on cloudy days and during winter months. Applying sunscreen consistently throughout the year helps maintain healthy skin and prevents long-term damage.

8) Amount Matters:

Most people don’t apply enough sunscreen to achieve the stated level of protection. The general guideline is to use about one ounce (enough to fill a shot glass) for a full-body application. Applying too little reduces the effectiveness of the sunscreen.


Sunscreen is more than just a lotion to shield your skin from the sun. It’s a vital component of a comprehensive skincare routine, offering protection against various environmental factors. By understanding these surprising aspects of sunscreen, you can make more informed choices about your sunscreen its application and ensure that your skin remains healthy and radiant for years to come.