Understanding SPF, UV Rays, and Blue Light: Protecting Your Skin
What is SPF?
SPF stands for Sun Protection Factor. It measures the level of protection a sunscreen provides against UVB rays, which are the main cause of sunburn and contribute to skin cancer. For example, an SPF 30 sunscreen allows you to be in the sun 30 times longer without getting sunburned than if you were not wearing any sunscreen.
Types of UV Rays
1. UVB Rays – These rays have a short wavelength and penetrate the outer layer of the skin. They are primarily responsible for sunburn and can contribute to skin cancer.
2. UVA Rays – These rays have a longer wavelength and penetrate deeper into the skin. They contribute to skin aging and wrinkling (photoaging) and also play a role in the development of skin cancer.
Importance of Broad-Spectrum Sunscreen
Broad-spectrum sunscreens protect against both UVA and UVB rays. It’s important to choose a sunscreen labelled as “broad-spectrum” to ensure comprehensive protection. Regular use of broad-spectrum sunscreen can prevent sunburn, reduce the risk of skin cancer, and slow down the signs of aging.
Blue Light – The Hidden Threat
Blue light, also known as high-energy visible (HEV) light, is emitted by the sun as well as digital screens like smartphones, computers, and tablets. While blue light exposure from screens is much less intense than from the sun, the cumulative effect of prolonged screen time can have potential effects on the skin.
Effects of Blue Light on the Skin
1. Skin Aging – Blue light can penetrate the skin more deeply than UVB rays, potentially causing oxidative stress and contributing to premature skin aging.
2. Hyperpigmentation – Prolonged exposure to blue light can lead to the development of dark spots and uneven skin tone.
3.Inflammation – Blue light can trigger inflammation and exacerbate existing skin conditions like acne and rosacea.
Protecting Your Skin
1. Use Broad-Spectrum Sunscreen – Choose a broad-spectrum sunscreen with at least SPF 30 and apply it generously 15 minutes before sun exposure. Reapply every two hours and after swimming or sweating.
2. Seek Shade – When the sun is strongest, typically between 10 a.m. and 4 p.m., seek shade to minimize direct exposure.
3. Wear Protective Clothing – Hats, sunglasses, and clothing with UV protection can provide additional barriers against UV rays.
4. Reduce Screen Time – Limit the use of digital devices when possible, especially before bed, to reduce blue light exposure.
5. Blue Light Filters – Use screen protectors or settings that filter blue light on your devices.
One thing that often prevents regular, daily use of sunscreens is how they feel on the skin. Thick, gloopy creams that can exacerbate breakouts – no thanks! But not with Dermalogica sunscreens.
Here at Ruby Jo’s we have a wide selection of Dermalogica SPF moisturisers, designed for daily use that not only offer broad spectrum UV defence but are also formulated to treat the skin condition and offer additional skin defending antioxidants, all in a wearable, non-clogging formula.
Prisma Protect SPF30 A light-activated moisturiser with intelligent drone technology to boost skin luminosity plus antioxidant technology to protect against pollution. Suitable for all skins.
Dynamic Skin Recovery SPF50 A medium-weight moisturiser for ageing skins. Antioxidant Whit Tea and a unique Peptide protect skin whilst minimising the appearance of skin ageing.
Invisible Physical Defence SPF30 Ideal for sensitive skins and those who don’t tolerate chemical sunscreens. Invisible, weightless defence with ultra-sheer Zinc Oxide. Also defends against blue light.
Oil Free Matte SPF30 An oil absorbing, light-weight moisturiser for oily, breakout prone skins. Oil absorbers help maintain an all-day matte finish.
Protection 50 Sport SPF50One for all the family for face and body. This light-weight formula is water-resistant (80 minutes) so perfect for the sports enthusiast.
Protecting your skin from UV rays and blue light is crucial for maintaining healthy skin and preventing long-term damage. By understanding the importance of SPF, using broad-spectrum sunscreen, and taking additional protective measures, you can safeguard your skin against the harmful effects of the sun and digital screens. Stay informed, stay protected, and keep your skin glowing!