Chemical Sunscreens: Everything You Need to Know

If you're a skincare content creator or simply a skincare enthusiast, listen up! I'm about to reveal some really important information about sunscreens that you definitely need to know. I'm Dr. Heather, MD, board-certified dermatologist, and here's everything you need to know about chemical sunscreens in a nutshell!

Key Takeaways

  • How They Work: Chemical sunscreens absorb UV radiation and convert it into heat energy, which is then released from the skin.

  • UV Filters: These are the ingredients in sunscreens that filter UV light to protect your skin from the sun.

  • UVB Protection: Common UVB filters include oxybenzone, octinoxate, octisalate, homosalate, and octocrylene.

  • UVA Protection: Avobenzone and ecamsule are UV filters that offer broad UVA coverage, while oxybenzone and octocrylene provide partial UVA protection.

  • The Greasiness Factor: Some chemical sunscreens can feel greasy due to the oil-soluble nature of certain UVA filters.

Understanding Chemical Sunscreens

Chemical sunscreens work by absorbing UV radiation and converting it into heat energy, which is then released from the skin. Think of it like a sponge soaking up water, except in this case, the "water" is harmful UV radiation.

UV Filters

These sunscreens contain a variety of active chemical ingredients that act as UV filters. Each filter offers protection against different types of UV radiation.

UVB Protection: Shielding from Sunburn

Common UVB filters include:

  • Oxybenzone

  • Octinoxate

  • Octisalate

  • Homosalate

  • Octocrylene

These ingredients primarily block UVB rays, which are the main culprits behind sunburn and contribute to skin cancer.

UVA Protection: Preventing Aging and Dark Spots

When it comes to UVA protection, the following ingredients are commonly used:

  • Avobenzone and Ecamsule: These offer broad UVA coverage.

  • Oxybenzone and Octocrylene: Provide partial UVA protection in addition to their UVB blocking action.

UVA rays are primarily responsible for premature aging, wrinkles, and dark spots (hyperpigmentation).

Addressing the Greasiness

Now, let's address the elephant in the room: some chemical sunscreens can be greasy! The reason for this is that some of the common ingredients that block UVA are actually oils themselves. This can be a trade-off for the added protection against UVA that these sunscreens offer.

The Good News

The good news is that many chemical sunscreens have been specifically formulated to reduce greasiness. Look for lightweight options designed for oily skin that still provide broad-spectrum coverage. These formulas often contain ingredients that mattify the skin and absorb excess oil, allowing for a more comfortable, non-greasy feel.

Conclusion

Chemical sunscreens can be a great option for sun protection, especially if you prefer a lightweight, non-whitening formula. Just be sure to choose wisely and look for products tdesigned for oily skin if greasiness is a concern.

If you want to learn more about sunscreens and everything else skincare, check out my ebook, The Ultimate Skincare Guide! It's an evidence-based, comprehensive skincare resource packed with all the information you need to up your skincare game.

Mary Rose Agojo