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Zasha K
Mar 203 min read

Sunscreens, SPF, and PA+ simplified.

Updated: May 6

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Sunscreen is an crucial product in our daily skincare routine, especially when it comes to protecting our skin from the harmful effects of the sun and the damaging impact of ultraviolet radiation (UV).


What is Sunscreen SPF?


SPF stands for Sun Protection Factor, which is a measure of how effectively a sunscreen can protect the skin from UV radiation. It indicates the level of protection provided against the sun's harmful rays. The SPF value corresponds to the amount of time an individual can stay in the sun without getting sunburned compared to the time it takes for the skin to burn without any protection. For instance, an SPF 50 sunscreen means that it will take 50 times longer for the skin to burn compared to being exposed without any sunscreen.

SPF

Blockage Percentage

15

93% of UV Rays

30

97% of UV Rays

50

98% of UV Rays

100

99% of UV Rays

That being said, this does not have any relationship with the time a sunscreen will stay on your skin. The American Association of dermatology recommends applying sunscreen every two hours, or immediately after you are done swimming or sweating.


Furthermore, there is an additional Japanese rating system added to the labels of sunscreen which measure how effective is the sunscreen against UVA rays. This is the PA+ scale, and it's designed to be used in combination with the SPF scale to get the maximum protection against UVA and UVB rays, respectively.


Functions of Sunscreen


  • Protection against UVB Rays: Sunscreen with SPF shields the skin from ultraviolet B (UVB) radiation, which is responsible for sunburns and skin damage. UVB rays can cause immediate harm to the skin, leading to redness, inflammation, and sunburn.

  • Defense against UVA Rays: Sunscreen also guards against ultraviolet A (UVA) radiation, which penetrates deeper into the skin and is responsible for long-term damage. UVA rays can lead to premature aging, wrinkles, and an increased risk of skin cancer.

  • Prevents Sun-Induced Hyperpigmentation: Sunscreen SPF helps in preventing sun-induced hyperpigmentation, which refers to the darkening of the skin caused by excessive melanin production due to sun exposure. Regular use of sunscreen can minimize the appearance of dark spots, uneven skin tone, and melasma.


Benefits in Skincare


  • Protection against Skin Cancer: Prolonged exposure to the sun's rays without protection can significantly increase the risk of developing skin cancer. Sunscreen with a high SPF provides a vital barrier against harmful UV radiation, reducing the chances of skin cancer.

  • Anti-Aging Properties: Sunscreen plays a crucial role in preventing premature aging signs such as wrinkles, fine lines, and sagging skin. By shielding the skin from UVA rays, it helps maintain a youthful appearance and keeps the skin looking healthy and supple.

  • Maintenance of Even Skin Tone: Sunscreen SPF assists in maintaining an even skin tone by preventing the formation of dark spots and hyperpigmentation caused by sun exposure. It helps in achieving a more radiant and uniform complexion.


Best Reviewed Brands to look for Sunscreen Products


  • Neutrogena: Offers a wide range of sunscreen products with different SPF levels, catering to various skin types and needs. Their formulas are lightweight, non-greasy, and provide effective protection against both UVA and UVB rays.


  • La Roche-Posay: Known for their dermatologist-recommended skincare products, offers sunscreens with high SPF, ensuring optimal protection against harmful sun rays. Their products are suitable for sensitive skin and provide long-lasting hydration.


  • EltaMD: Is a popular brand among dermatologists, known for its highly effective sunscreen formulations. Their products are formulated with zinc oxide, providing broad-spectrum protection and suitable for sensitive skin.


  • Supergoop!: Offers a range of innovative sunscreen products, including lightweight formulas, tinted sunscreens, and moisturizers with SPF. Their products are cruelty-free and provide excellent protection against UVA and UVB rays.



Sunscreen is an essential component of our skincare routine. It protects our skin from harmful UV radiation, preventing sunburns, premature aging, and lowering the risk of skin cancer. By using sunscreen regularly, we can maintain a healthy and youthful complexion. Remember, sunscreen is not just for beach days; it should be incorporated into our daily skincare regimen for overall skin health.



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