Chemical sunscreens work by absorbing ultraviolet (UV) radiation and turning it in to heat, which is then released from the skin. Chemical sunscreens are generally more effective than physical sunscreens at blocking UV rays, but they can be more irritating to the skin.
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Physical sunscreens work by reflecting and scattering UV radiation away from the skin. The most common physical sunscreen ingredients are zinc oxide and titanium dioxide. Physical sunscreens are generally less irritating to the skin than chemical sunscreens, but they can be less effective at blocking UV rays.
So, which type of sunscreen is best? The answer may depend on your individual skin type and preferences. If you have sensitive skin, you may want to choose a physical sunscreen. If you are looking for the most effective sunscreen, you may want to choose a chemical sunscreen.
No matter which type of sunscreen you choose, it is important to apply it generously and reapply it often, especially if you are sweating or swimming.
Zinc oxide and titanium dioxide work by sitting on top of the skin and reflecting the sun’s UV rays away from the body. They don’t absorption into the skin like chemical sunscreens, which is why they’re often referred to as “physical sunscreens.”
When it comes to chemical sunscreens, there are two main types of ingredients:
Avobenzone: This is the most common type of chemical sunscreen ingredient. It protects against the full spectrum of UVA rays, but it can break down in the sun, so it needs to be paired with other ingredients for stability.
Oxybenzone: This is a chemical sunscreen ingredient that’s been shown to absorb into the skin. It provides good protection against UVB rays, but it doesn’t protect against the full spectrum of UVA rays.
The best chemical sunscreens will have a combination of both avobenzone and oxybenzone for the best protection against both UVB and UVA rays.
When it comes to physical sunscreens, zinc oxide is the best ingredient for protection against the full spectrum of UVA and UVB rays. It’s also stable in the sun, so it doesn’t need to be paired with other ingredients.
Titanium dioxide is another physical sunscreen ingredient that protects against the full spectrum of UV rays. However, it can be unstable in the sun, so it’s often paired with zinc oxide for stability.
The best sunscreens will have a combination of zinc oxide and titanium dioxide for the best protection against both UVB and UVA rays.
