As the sun’s rays beam down, it’s crucial to shield our skins from potential harm caused by ultraviolet (UV) radiation. Sunscreen is our go-to defender, but with a plethora of options on the market, understanding SPF (Sun Protection Factor) and its nuances is essential for making informed choices about the correct sun protection.
In this blog post, we’ll delve into the world of SPF, shedding light on what makes a good sunscreen, and deciphering the meanings behind terms like HEV, UVA, UVB, and IR-A.
Understanding UV Radiation:
UVB (B for Burn): UVB rays primarily cause sunburn and contribute to the development of skin cancer. SPF measures a sunscreen’s effectiveness against UVB rays. This refers to that little number following the SPF on your favourite sunscreen.
UVA (A for Ageing): UVA rays penetrate deeper into the skin, leading to premature ageing and playing a role in skin cancer development. Contrary to popular belief your UVB SPF alone doesn’t provide the full picture of protection against UVA rays.
HEV (High-Energy Visible) Light:
Also known as blue light, HEV light is emitted by electronic devices and the sun. Though research on its long-term effects is ongoing, some studies suggest potential skin damage caused by these HEV rays. Sunscreens labelled as “broad-spectrum” often protect against HEV light.
IR-A (Infrared-A) Radiation:
IR-A rays penetrate the skin deeply, contributing to skin ageing and damage. While sunscreen primarily focuses on UV protection, some formulations may include antioxidants to address the damage caused by IR-A radiation.
Decoding SPF is an important part of understanding how to choose your sunscreen correctly, so let’s look at the basics first. SPF indicates a sunscreen’s ability to protect against UVB rays. For example, SPF 50 filters about 98% of UVB rays.
Look for sunscreens labelled as “broad-spectrum,” indicating protection against both UVA and UVB rays. This ensures comprehensive defence agains not only sun-related burning (increasing chances of skin cancer) but also the effect on premature ageing of the skin.
If you’re swimming or sweating, opt for water-resistant sunscreens. Keep in mind that no sunscreen is entirely waterproof, and reapplication after swimming or excessive sweating is crucial.
Remember to read the label. Choose sunscreens with zinc oxide, titanium dioxide, avobenzone, or Mexoryl SX for effective UVA protection.
Sunscreen should be part of your daily skincare routine, even on cloudy days. Apply it generously, and don’t forget easily overlooked areas like the ears, neck, décolleté and hands.
The quest for the perfect sunscreen involves understanding the intricacies of UV radiation and selecting products that offer comprehensive protection.
Beyond the SPF number, look for broad-spectrum coverage, water resistance, and skin-friendly ingredients. By incorporating a reliable sunscreen into your daily routine, you’ll not only shield your skin from harm but also promote long-term skin health. SPF is after-all your first line of defence against ageing caused by the sun. If nothing else, at least remember your sunscreen.
Stay protected, stay radiant!