What's the difference in sunscreen and sunblock?

Sunscreen and sunblock are often used interchangeably, but there is a difference in how they work and what they’re made of:

Sunscreen (Chemical)

• How it works: Sunscreen absorbs UV radiation like a sponge before it can penetrate your skin. It uses chemical ingredients to do this.

• Common ingredients: Avobenzone, oxybenzone, octinoxate, homosalate, octisalate.

• Texture: Tends to be thinner and easier to rub in without leaving a white cast.

• Pros: Lightweight, often invisible on the skin, great for everyday wear under makeup.

• Cons: Can irritate sensitive skin or eyes; some ingredients are under environmental scrutiny (like oxybenzone in coral reef areas).

Sunblock (Physical or Mineral)

• How it works: Sunblock sits on top of the skin and physically blocks or reflects UV rays.

• Common ingredients: Zinc oxide, titanium dioxide.

• Texture: Thicker, often leaves a white or tinted cast (though newer formulas are improving).

• Pros: Less likely to irritate skin; starts working immediately; better for sensitive skin and kids.

• Cons: Can feel heavier or look chalky, especially on darker skin tones (though there are tinted versions now).

Quick Comparison:

• Sunscreen = chemical, absorbs UV, lightweight.

• Sunblock = physical, reflects UV, better for sensitive skin.