How does Sun Protection Factor (SPF) work?
We all know how important it is to wear clothes and accessories with a Sun Protection Factor (SPF) before summer vacation, but we are not ashamed to admit that we are clueless about what SPF actually does and how specifically it helps. So, we did some research and will share with you everything we learned about SPF in today’s blog post.
Before we get into the details, I want to explain a little more about the difference between UVB and UVA. Both types of radiation damage the skin in their own way. The easiest way to remember this is: UVB = Burning. It affects the surface of the skin, causing the burning sensation that comes with overexposure to the sun. UVA = Aging, which generally means that these rays penetrate deep into the skin and reach the underlying layers, causing skin aging, such as the breakdown of collagen and elastin. UVA radiation is constant and requires protection year-round because it can penetrate clouds, glass, and water. Therefore, many skin experts recommend using sunscreen every day, even on cloudy, overcast days, to ensure that the skin is adequately protected.
What is Sun Protection Factor SPF?
In simple terms, SPF is a product that blocks the sun’s rays from damaging or burning your skin. Generally speaking, the higher the factor, the more effective it is at blocking all UV radiation. Noting down the SPF number will help you understand how long you can safely stay in direct sunlight before your skin starts to burn.
To better understand how this factor protects your skin, think about how long it takes for your skin to turn pink when exposed to direct sunlight. If your skin turns pink quickly, choosing the highest factor will protect you from burning your skin. If you use SPF 30, you can usually get about 5 hours of sun protection. It is calculated by multiplying the SPF value by the time it would take you to get a sunburn without protection.
Here’s how to know how long SPF will be effective for you:
Consider your skin type and risk of sunburn
Apply correctly and generously, about one tablespoon per limb, more for larger areas
Make a note of when you apply SPF so you’re ready for reapplication
Reapply if standing in water or sweating
Avoid direct sunlight during the hottest part of the day
If you stay vigilant when in the sun, you’ll find your skin is protected and shows no signs of burning.
When protecting your face with SPF, it’s recommended to use products specifically formulated for the face to avoid issues with clogged pores, which sometimes lead to acne. Make sure to cleanse your skin thoroughly and follow an intensive, aggressive skin care routine to keep your skin healthy, radiant, and spot-free.
How is the SPF value of a sunscreen product determined?
SPF is a measure of the effects of UV radiation and how long it takes for your skin to suffer sun damage. First introduced in 1974, while the results cannot be considered water-resistant, it allows SPF users to track their skin’s exposure to the sun, with UVB being the main radiation that protects the skin from sunburn.
UVA rays are a little harder to avoid because the effects of these rays are invisible, and you can’t see the effects of sun exposure very quickly. Therefore, broad-spectrum sunscreens with SPF were developed to protect the skin from both UVB and UVA radiation. You can also check the ingredient list on the packaging to see if the formula contains substances such as zinc oxide or titanium dioxide, as this will help you better protect your skin.
For long-term benefits, it is recommended to follow a safe sun protection regimen that includes gradual exposure to the sun, generous application of SPF sunscreen on the skin, frequent reapplication, and adequate hydration.
When should I reapply SPF sunscreen?
The effectiveness of SPF decreases when exposed to direct sunlight. This is why reapplying sunscreen is an important step in your skin care routine.
If you don’t want to spend too much time in the sun while commuting, adding SPF to your morning skincare routine will provide you with enough protection during your commute.
If you expect to be outdoors for a long time, reapply SPF after 2 hours to ensure optimal sun protection. Many skin care products (especially moisturizers) have SPF in them, and using these products is a good start to sun protection. However, there is a common skin myth that says you will get more SPF if you use several different SPF products. Unfortunately, this is not true, and it is the most important factor over any other factor you may apply to your skin. For example, if you use a factor of 15 in your moisturizer formula before applying SPF 30 every day, the 30 will provide skin protection.
What is the best sunscreen with an SPF value?
Any sunscreen with an SPF value is better than none! The formulations and ingredients of everyday SPF products have changed a lot since the 1970s, so I am sure there is a product that is right for you. From built-in SPF to moisturizers, mineral solutions, sprays, and lightweight day creams, no matter your skin type, you can find a product that will protect your skin from UV rays and damage without causing other skin problems (such as acne).
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