Sunscreen helps protect you from overexposure to the sun’s damaging rays which can contribute to fine lines and wrinkles, signs of premature aging and skin cancer. Regular use of a broad-spectrum (UVA and UVB coverage) spf has been shown to reduce the risk of non melanoma skin cancer and melanoma, the most aggressive form of skin cancer.
But when choosing a sunscreen, you have a few decisions to make. Are you slathering up with a mineral or chemical sunscreen? Does it even matter which one you use? Yup, it does.
The key difference between these types of sunscreens lies in how they block rays.
Mineral (physical) spf
- Physical sunscreens, more commonly known as mineral sunscreens, work by creating a physical barrier on the skin that shields it from the sun’s rays. These sunscreens deliver broad-spectrum protection by reflecting UV radiation away from your skin.
- Mineral sunscreens can also help block UVA rays that come through windows, which can cause pigmentation and breakdown of collagen.
- Most mineral sunscreens are formulated with zinc oxide and titanium oxide.
- Found in formulations for both body and face.
- Starts working as soon as it is applied to the skin.
- Suitable for sensitive skin.
- Mineral sunscreens have one downside: They can be chalky, difficult to spread and tend to leave behind a noticeable white cast to the skin. If you have a darker complexion, this whitish cast can be especially apparent.
Chemical spf
- Absorbs UV rays and converts them into heat, which is then released from the skin.
- Contains organic (carbon-based) compounds such as avobenzone and oxybenzone
- Tends to be lighter and easier to apply than physical sunscreen.
- Takes about 20 minutes to start working after it is applied to the skin.
- May be more likely to cause irritation or allergic reactions in some people.
- Some chemical sunscreen ingredients have been linked to environmental concerns such as coral reef damage.