The primary distinction between sunscreen and sunblock lies in their composition and how they protect your skin from UV rays.
Sunscreen aka Chemical Sunscreen
Sunscreen, often referred to as chemical sunscreen, absorbs into the skin and then absorbs UV rays, converts the rays into heat, and releases them from the body. The active ingredients in sunscreens are usually compounds like avobenzone, octinoxate, and oxybenzone, which create a chemical reaction and work by filtering sunlight. These ingredients protect against UVA and UVB rays, making sunscreens broad-spectrum.
Pros of Sunscreen:
- Typically lighter in texture and more wearable under makeup.
- Easier to apply without leaving a white residue.
- Ideal for daily use, especially for those with darker skin tones as it blends more seamlessly.
Cons of Sunscreen:
- Must be applied 15 to 30 minutes before sun exposure to be fully effective.
- Can possibly cause irritation or allergic reactions due to the chemical ingredients.
- Requires more frequent reapplication as the protection decreases faster, especially when in direct UV light.
Sunblock aka Physical SPF
Sunblock, often termed physical sunscreen, acts like a shield. It sits on top of your skin and physically blocks UV rays. The active ingredients such as titanium dioxide or zinc oxide reflect the sun’s rays from your skin. Sunblock is effective as soon as you apply it, reflecting both UVA and UVB rays.
Pros of Sunblock:
- Starts working immediately upon application.
- Less likely to cause irritation, making it suitable for sensitive skin and children.
- Longer-lasting on the skin's surface, especially in direct UV exposure.
Cons of Sunblock:
- Can leave a white cast or tint, making it less desirable for darker skin tones or everyday cosmetic use.
- Often has a thicker consistency, which might feel heavy or greasy.
- Can rub off more easily, requiring reapplication especially after physical activities or swimming.
When it comes to choosing between sunscreen and sunblock, there are few things to keep in mind.
Your skin type: If you have sensitive or acne-prone skin, sunblock might be a better choice as it is less likely to irritate or clog pores. For daily use, particularly under makeup, a sunscreen might be preferable due to its lighter texture.
Your daily activities: For extensive outdoor activities like swimming or sports, sunblock is generally more resistant to sweat and water. For daily use, sunscreen is adequate and easier to use.
Regardless of whether you choose sunscreen or sunblock, ensure it offers broad-spectrum protection, which shields your skin from both UVA and UVB rays.
Both sunscreen and sunblock provide essential protection against harmful UV rays, the leading cause of premature skin aging and skin cancers. The right choice depends on your skin type, the level of sun exposure, and personal preference in texture and application.
By understanding the differences and selecting the right product, you can effectively protect your skin while enjoying the sun safely.
