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Jak działa matujący krem do opalania twarzy SPF 30 od Nivea Sun
Nivea sun krem matujący do opalania twarzy spf 30
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Protective sunscreen for body and face SPF 30 is a concentrated dermocosmetic with high sun protection.
WHAT IS SPF AND WHAT DOES IT STAND FOR?
SPF stands for Sun Protection Factor, what it means is the amount of time the sunscreen will protect your skin from UV rays . The higher the SPF, the longer the protection will last. Learn everything you need to know about SPF including how long factor 50 lasts, how it works and which number is best suited to your skin.
What does the SPF number mean?
But keep in mind that this is just an approximation since you might not be taking as long to burn depending on the season, the weather or even your geographic location.
How Does SPF Work?
The active ingredients in sunscreens work to protect skin by either reflecting or absorbing UV rays, preventing sun induced damage. Physical (AKA mineral) sunscreens work to reflect UV light, whereas chemical sunscreens absorb it. The amount of UV rays filtered depends on the level of SPF you apply:
SPF15 blocks 93% UVB rays
SPF30 blocks 96.7% UVB rays
SPF50 blocks 98% UVB rays
SPF100 blocks 99% UVB rays
UVB rays can never be totally filtered, which is why it is important to reapply SPF protection at least every 2 hours.
WHICH SPF SHOULD YOU USE?
The strength of SPF in your lotion should be at least 30, and chosen depending on your skin type, your application process and your plans for the day.
Choosing the right SPF for your skin type
Opposite to what we may think, the percentage of melanin present in your skin, which makes your skin colour darker, does not influence the level of SPF you need. Darker skin still needs to be protected against harmful rays, with at least SPF 30. However, when you have a lighter skin tone, you should apply sunscreen more frequently, since the melanin in your skin might not resist the sun for as long.
The minimum level of SPF recommended for each skin type during the average day is:
Dry skin: use SPF 30
Sensitive skin: SPF 50 as skin is more susceptible to damage, factor 50 will provide stronger protection
Mature skin: also use SPF 50 for similar reasons to sensitive skin, skin becomes more fragile with age
What you should remember about the SPF number is: the higher it is, the longer and better your skin is protected against UV rays. If you have a skin condition and are unsure on the SPF you should be wearing, we would advise you to talk to your doctor.