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Quelle protection SPF choisir au quotidien ?

Which SPF protection should you choose on a daily basis?


In the vast world of sun protection, the question of SPF (Sun Protection Factor) frequently arises: SPF25 or SPF50, which is the best option for daily use? But beyond simple figures, shouldn't we also question the effectiveness against UVA rays, as well as the protection against the visible spectrum, in particular blue light, the cause of daily skin aging?

SPF25 or SPF50: what are the differences?

Choosing the right sun protection is essential to preserve the health of your skin against the harsh effects of the sun, 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 1-2% more protection. Certainly, the latter will allow you to stay exposed longer before getting sunburned (definition of SPF), but will still require frequent reapplication during the day for optimal protection. Thus, the key lies in regular reapplication , and it is preferable to opt for SPF25 protection offering a pleasant texture, thus promoting sensory reapplication throughout the day.

Daily SPF15: clinically proven benefits

The clinically proven study conducted by Adèle Green in Nambour, Queensland, Australia, on 1621 participants using SPF15 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 has also shown a notable decrease in 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 Daily Use

For effective daily protection against sun damage, it is essential to focus on measuring UVA protection and visible light , which are major contributors to skin aging and oxidative stress. Rather than focusing solely on SPF, it's 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 ensures that the skin is properly protected against external aggressions, thus guaranteeing healthy and preserved skin on a daily basis.

For optimal protection:

  • Choose a sunscreen with an SPF of at least 15.
  • Opt for “Broad Spectrum” protection to filter UVA and UVB.
  • Select protection with a PA+++ rating for enhanced defense against UVA.
  • Be sure to protect yourself from pollution and HEV blue light.
  • Reapply frequently as recommended for maximum effectiveness.


Whatever level of SPF and PA you choose, it's essential to remember that reapplication is key to optimal protection. We recommend that you opt for SPF25 PA+++ protection with a pleasant texture for sensory reapplication throughout the day, and take care to protect yourself against the multiple attacks of the urban environment (pollution, blue light).

TRUE FILTER™ Urban Protective Mist: a small gesture for big protection

Complete ultra-broad spectrum UVB/UVA protection

TRUE FILTER™ provides patented ultra-broad spectrum protection against UVA, UVB, and blue light (HEV), exceeding that of conventional sunscreens. With SPF25, this mist filters 96% of UVB rays, emphasizing the part of the light spectrum most influential in photoaging : UVA.

Reduction of oxidative stress and PA+++ classification

Displaying a PA+++, TRUE FILTER™ prioritizes deep protection against photoaging, the main cause of 80% of skin aging. This mist offers comprehensive defense rather than targeting specific symptoms.

Explore the TRUE FILTER™ urban protective mist from Substance Of Light ® , a real breakthrough in daily skin protection.


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