10 Life-Saving Facts About Sunscreen For Healthier Skin

The sun can be both beneficial and harmful. While it provides essential vitamin D, overexposure to UV rays can lead to sunburn and even skin cancer. That’s why using sunscreen is critical, regardless of your skin tone. However, sunscreen does more than just protect you from harmful rays. From knowing the right type for sensitive skin to avoiding that unwanted white cast, here are 10 key facts about sunscreen that could save your skin.

1. Chemical vs. Physical Sunscreen: What’s the Difference?

Chemical sunscreens contain ingredients that absorb UV rays before they penetrate the skin, while physical sunscreens (also called mineral sunscreens) reflect UV rays away from the skin. Both types protect you from harmful UV exposure, but they function differently.

2. Sensitive Skin? Choose Mineral Sunscreens

If you have sensitive skin, opt for mineral sunscreens containing zinc oxide or titanium dioxide. These ingredients are less likely to cause irritation, unlike chemical sunscreens that can sometimes trigger skin reactions.

3. Look for ‘ Broad Spectrum ’ on the Label

Sunscreens with the "broad spectrum" label protect against both UVA and UVB radiation. UVA rays cause skin aging, while UVB rays are responsible for sunburn. A broad-spectrum sunscreen offers protection from both, reducing the risk of skin cancer.

4. The Right Amount Matters

Applying enough sunscreen is key to ensuring effective sun protection. Failing to use an adequate amount can lower the Sun Protection Factor (SPF), which reduces its effectiveness.

5. SPF 30 for Optimal Protection

Dermatologists recommend using a sunscreen with an SPF of at least 30. SPF 30 protects your skin from around 97% of UVB rays, which are the main cause of sunburn.

6. No, Sunscreen Won’t Cause a Vitamin D Deficiency

Despite concerns, studies show that using sunscreen does not lead to vitamin D deficiency. Even with sunscreen, your skin can still produce enough vitamin D from sun exposure.

7. Expired Sunscreen? Time to Toss It

Sunscreen loses its effectiveness after it expires. Once expired, it functions only as a moisturizer and no longer provides UV protection , leaving you vulnerable to sunburn and skin damage.

8. The Inventor of Sunscreen

Sunscreen was invented in 1938 by Franz Greiter, after he suffered sunburn while climbing a mountain on the Swiss-Austrian border. His creation has since become an essential part of skincare.

9. Why Sunscreen Stings Your Eyes

Ever wonder why some sunscreens irritate your eyes? The culprit is avobenzone, a common ingredient in chemical sunscreens that converts UV rays into heat. While effective for UV protection, it can cause discomfort if it gets into your eyes.

10. Follow the ‘Shot Glass Rule’

For full-body sun protection, dermatologists recommend using about a shot glass’s worth of sunscreen—roughly one ounce (29.6 milliliters). Applying this amount ensures you’re fully covered and maximizes protection.

By understanding these facts, you can make informed choices about your sunscreen routine and keep your skin safe from the sun’s harmful effects.