Introduction
In the vast world of sunscreens, the question of SPF (Sun Protection Factor) frequently arises: SPF25 or SPF50, which is the best option for daily use? But beyond simple numbers, shouldn't we also be asking ourselves about effectiveness against UVA rays, as well as protection against the visible spectrum, particularly blue light, which causes daily skin aging?
SPF25 or SPF50: what are the differences?
Choosing the right sunscreen is essential to maintaining the health of your skin against the sun's harmful effects, especially on a daily basis. It is crucial to understand that an SPF25, although it may seem less protective, filters 96% of UVA and UVB rays , while an SPF50 only adds 1 to 2% additional protection. While the latter will allow you to stay exposed longer before getting sunburned (definition of SPF), it will still require frequent reapplication throughout the day for optimal protection. Thus, the key lies in regular reapplication , and it is best to opt for an SPF25 protection that offers a pleasant texture, thus promoting sensory reapplication throughout the day.
SPF15 for everyday use: clinically proven benefits
A clinically proven study conducted by Adele Green in Nambour, Queensland, Australia, on 1,621 participants using SPF 15 daily revealed a 50% reduction in melanomas after 10 years of follow-up. Regular application to the face, neck, arms, and hands during this period also showed a significant reduction in the signs of skin aging. These results highlight the preventive effectiveness of SPF, even at moderate levels, in protecting against skin cancer and premature aging.
Considerations for everyday use
For effective daily protection against sun damage, it is essential to focus on measuring UVA and visible light protection , which are the main contributors to skin aging and oxidative stress. Rather than focusing solely on SPF, it is important to look for sunscreen with a PA+++ rating for enhanced defense against UVA rays, as well as specific protection against visible light. This approach helps ensure that the skin is adequately protected against external aggressors, thus ensuring healthy and preserved skin every day.
For optimal protection:
- Choose a sunscreen with an SPF of at least 15.
- Choose “Broad Spectrum” protection to filter UVA and UVB rays.
- Select protection with a PA+++ rating for enhanced defense against UVA rays.
- Make sure to protect yourself from pollution and HEV blue light.
- Reapply frequently as recommended for maximum effectiveness.
Conclusion
Regardless of the SPF and PA level you choose, it's essential to remember that reapplication is key to optimal protection. We recommend opting for SPF25 PA+++ protection with a pleasant texture for sensory reapplication throughout the day, and ensuring protection against the multiple aggressions of the urban environment (pollution, blue light).
TRUE FILTER™ Urban Protective Mist: a small step for big protection
Complete ultra-broad spectrum UVB/UVA protection
TRUE FILTER™ offers patented ultra-broad spectrum protection against UVA, UVB, and blue light (HEV), surpassing that of conventional sunscreens. With SPF25, this mist filters 96% of UVB rays, focusing on the part of the light spectrum most influential in photoaging : UVA.
Reduction of oxidative stress and PA+++ classification
With a PA+++ rating, TRUE FILTER™ prioritizes deep protection against photoaging, the primary cause of 80% of skin aging. This mist offers comprehensive defense rather than targeting specific symptoms.
Explore Substance Of Light ® TRUE FILTER™ Urban Protective Mist , a true breakthrough in everyday skin protection.
Bibliography
- A. Green, et al. “Sunscreen and prevention of skin aging: a randomized trial” Ann Intern Med. 2013 Jun 4;158(11):781-90. https://pubmed.ncbi.nlm.nih.gov/23732711/
- MR lannacone, MCB Hugues, AC Green “Effects of sunscreen on skin cancer and photoaging” Photodermatol Photoimmunol Photomed. 2014 Apr-Jun;30(2-3):55-61. https://pubmed.ncbi.nlm.nih.gov/24417448/
