SPF (Solskyddsfaktor) – hudvårdsingrediens för bättre hud | Skinroller

SPF (Sun Protection Factor)

  • April 04, 2026
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  • Skriven av Skinroller
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  • 3 min läsning

Benefits: Protects against skin cancer, Prevents wrinkles, Counteracts pigmentation, Preserves skin health
Collections: Anti-aging, Pigmentation.
Skin types: All skin types

Imagine the absolute most important, most effective and irreplaceable product in your skincare routine. A product that all dermatologists and experts completely agree on. It is sunscreen. It is not just a product for beach days, but the daily insurance for your skin's health and youthfulness.

SPF stands for Sun Protection Factor. It is a measure of how well a product protects you from the sun's UVB rays, the ones that cause sunburn. But a modern, good sunscreen does much more. A "broad-spectrum" sunscreen also protects against UVA rays, the ones that invisibly accelerate skin aging. Using sunscreen every day is the absolute best thing you can do for your skin.

Benefits of SPF

  • Prevents skin cancer: This is the most important reason. Daily use of sunscreen has been proven to reduce the risk of all forms of skin cancer, including malignant melanoma.
  • Is the best anti-aging product: About 80% of the skin's visible aging (wrinkles, loss of firmness) is caused by the sun. By using sunscreen every day, you protect your collagen and elastin, which keeps the skin firm and smooth for longer.
  • Counteracts and reduces pigmentation: The sun is the biggest driver behind pigment production. If you target pigmentation but do not use sunscreen, they will always come back. Sunscreen is crucial for an even skin tone.
  • Protects the skin barrier and reduces redness: The sun's rays stress the skin and can weaken its protective barrier, leading to sensitivity and redness. Daily protection helps keep the skin calm and resilient.

Skin types and uses

Which skin type should use sunscreen? The answer is simple: all. Every day. Year-round. Even when it is cloudy, and even if you are just sitting indoors near a window.

  • For anyone who wants to prevent premature aging and wrinkles.
  • For anyone who wants to avoid developing or worsening pigmentation.
  • For anyone who wants to reduce their risk of skin cancer.
  • For anyone using active ingredients (like retinol or acids), as these make the skin extra sensitive to the sun.

How to use SPF

  • Application: Always use sunscreen as the last step in your morning routine, after your moisturizer. Do not mix it with your cream, as it dilutes the protection.
  • Amount: This is critical! You need a generous amount to achieve the protection stated on the bottle. A common recommendation is an amount equivalent to two fingers (index and middle finger) for the face and neck.
  • Timing: Apply every morning, 365 days a year.
  • Reapplication: If you are in direct sun, swimming, or sweating a lot, you must reapply every two hours to maintain protection.

FAQ

Which SPF should I choose?

All leading dermatological organizations recommend at least SPF 30 for daily use. If you have fair skin, burn easily, or use strong active ingredients, SPF 50 is an even safer choice.

I get breakouts from sunscreen, what should I do?

This does not mean you should stop using sunscreen, but rather that you need to find a different formulation. Try a lighter sunscreen suited for oily or acne-prone skin. Products with physical filters like zinc oxide can also be a gentler alternative.

Isn't the SPF in my foundation enough?

No, unfortunately not. To get the SPF protection stated on your foundation, you would need to apply an unnaturally thick layer of makeup. Consider the SPF in makeup as a small bonus, but never as your main protection. Always use a separate sunscreen underneath.

What is the difference between UVA and UVB?

Think of it like this: UVB are the rays that Burn the skin. UVA are the rays that Age the skin. A "broad-spectrum" sunscreen protects against both, which is absolutely necessary for complete protection.

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