Introduction
When it comes to sun protection, the amount and frequency of application are crucial aspects to ensure effective defense against UV rays, blue light, and air pollution. Adopting an appropriate strategy can make all the difference in preserving your skin's health. In this article, we will explore general recommendations and the nuances to consider based on various factors, while highlighting the effectiveness of TRUE FILTER™ for optimal protection.
Ideal quantity and frequency of application
The ideal quantity
Applying the right amount of product to exposed areas is essential to ensure adequate protection. Medical recommendations advocate for the use of 2 mg/cm2 of skin, which is equivalent to approximately 5-6 sprays of TRUE FILTER™ to effectively cover the face from a distance of 15-20 cm. It is important to note that many people only apply a fraction of this amount, thereby reducing the effectiveness of sun protection.
The optimal frequency of application
The frequency of reapplication depends on several factors. If you are at the beach or in the mountains, it is recommended to renew the application every 2 hours and after every swim. In urban settings, particularly in the city, it is essential to reapply throughout the day to maximize the product's effectiveness. Even when staying indoors, the use of sun protection on all exposed areas is necessary, as UV rays can penetrate glass. If you work near a window or are exposed to blue light, applying every four hours is recommended.
Factors influencing the frequency of application
Phototype
The variability of skin reactions according to phototypes influences the frequency of application. Fair skin requires more frequent protection than dark skin.
Family history of skin cancer
In the presence of a family history of skin cancer, vigilance is increased, involving regular check-ups and the rigorous application of protective measures, even for dark phototypes. Applying rigorous daily sun protection becomes an unavoidable necessity to reduce the risk of skin cancer.
Daily UV Index (UVI)
Deciding whether or not to apply sunscreen based solely on the appearance of the sky is a mistake. The UV index does not simply depend on the presence of clouds, but is the result of a complex equation including solar angle, altitude, cloud cover, stratospheric ozone, albedo, and shade. Do not be fooled: UVA rays persist, passing through clouds, windows, and even your epidermis.
Contrary to popular belief, clouds do not effectively protect against sun rays. A light veil of clouds blocks only 5 to 10% of rays, and may even increase the solar risk. To effectively counter photoaging, always opt for comprehensive sun protection, regardless of weather appearances.
Environment and lifestyle habits
Daily activities, such as working on a screen near a window or cycling to get to work, significantly influence exposure to light. These situations require adapted protection to counter the harmful effects of invisible and visible light, highlighting the importance of a diversified sun protection strategy.
Beware of digital, since we know that the blue light emitted by screens, particularly for fair skin, contributes to skin aging by generating oxidative stress and free radicals (ROS) in synergy with UVA. For dark skin, it can lead to hyperpigmentation and the appearance of spots. Thus, indoor and outdoor protection is crucial to prevent these harmful effects, regardless of phototype.
TRUE FILTER urban protective mist: the precise, touch-free solution for reapplying your sun protection
Discover the perfection of renewing your sun protection with TRUE FILTER™. Thanks to its innovative spray system, 5-6 sprays are enough for a precise application, even over makeup. Get an invisible, non-greasy protective veil, suitable for all phototypes, even the darkest. Reapply your protection with ease throughout the day, even if you are wearing makeup. And don't forget, with its portable 50 ml format, TRUE FILTER™ slips easily into your bag for sun protection at your fingertips, wherever you are!
Bibliography
- Venosa, Ali. “5 Sneaky Ways You’re Being Exposed to the Sun’s UV Rays.” The Skin Cancer Foundation, The Skin Cancer Foundation, 30 June 2022, https://www.skincancer.org/blog/sneaky-ways-youre-being-exposed-to-the-suns-uv-rays/
- 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/
- M. R. lannacone, M. C. B. Hugues, A. C. 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/
- E. Mahé et al. “Comparison between UV index measurements performed by research-grade and consumer-products instruments”. Photochemical & Photobiological Sciences. 2010 Apr;9(4):459-63.https://link.springer.com/article/10.1039/b9pp00179d
- A. Isvy, A. Beauchet, P. Saiag, E. Mahé. « Medical students and sun prevention: knowledge and behaviours in France. » J Eur Acad Dermatol Venereol. 2013 Feb;27(2):e247-51https://pubmed.ncbi.nlm.nih.gov/22827632/
