It's best to use a dedicated sunscreen product with a higher SPF for adequate sun protection, regardless of whether it's called sunblock or sun cream.
Understanding Sunscreen Terminology
The terms "sunblock" and "sun cream" are often used interchangeably to describe products designed to protect the skin from the sun's harmful ultraviolet (UV) rays. However, it's important to understand that both terms refer to the same category of product: sunscreen. The key differences lie in the ingredients and how they protect the skin.
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Sunblock (Historically): Historically, "sunblock" implied a physical barrier on the skin, using mineral ingredients like zinc oxide and titanium dioxide to reflect UV rays. These are often referred to as mineral sunscreens.
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Sun Cream (More Broadly): "Sun cream" typically refers to sunscreen that uses chemical filters, which absorb UV radiation and convert it into heat that is then released from the skin. However, the term can also encompass mineral sunscreens.
Why Dedicated Sunscreen is Preferred
While some moisturizers and cosmetic products contain SPF (Sun Protection Factor), they often don't provide sufficient protection, especially if you're spending a significant amount of time outdoors. Here's why a dedicated sunscreen is better:
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Higher SPF: Dedicated sunscreens are formulated to offer higher SPF values (30 or higher), providing more substantial protection against UVB rays (which cause sunburn).
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Broad-Spectrum Protection: Quality sunscreens provide "broad-spectrum" protection, meaning they shield against both UVA (aging) and UVB (burning) rays. Many moisturizers with SPF may not offer adequate UVA protection.
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Application Amount: People often apply moisturizers more sparingly than they would sunscreen. To achieve the SPF listed on the label, you need to apply a generous amount of sunscreen (about one ounce, or a shot glass full, for the entire body).
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Water Resistance: Sunscreens, especially those labeled "water-resistant," are formulated to maintain their effectiveness for a period of time even when you're sweating or swimming. Moisturizers with SPF typically aren't water-resistant.
Choosing the Right Sunscreen
Whether you choose a mineral sunscreen (historically called sunblock) or a chemical sunscreen (often called sun cream), consider the following:
- SPF 30 or Higher: Look for a product with an SPF of 30 or higher.
- Broad-Spectrum Protection: Ensure it protects against both UVA and UVB rays.
- Water Resistance: Choose a water-resistant formula if you'll be sweating or swimming.
- Skin Type: Select a formula that's suitable for your skin type (e.g., oil-free for acne-prone skin, fragrance-free for sensitive skin).
- Application Technique: Apply liberally and reapply every two hours, or more often if swimming or sweating.
In Summary
For optimal sun protection, choose a dedicated sunscreen with an SPF of 30 or higher and broad-spectrum protection. Whether you opt for a mineral-based formula or a chemical sunscreen, ensure you apply it generously and reapply frequently. Don't rely solely on moisturizers with SPF for adequate sun protection.
