Free ebook · 8 questions
The truth about UV rays: what no one is telling you (and that your skin undergoes)
Skin aging, dark spots, pollution: what light really does to your skin every day, and how to protect it all year round, without unnecessary overprotection.
- Why UVA rays are active all year round, even through certain windows
- What the SPF measures, and what it does not measure
- How to choose truly comprehensive protection
Seen in
In the ebook
8 questions, clear answers.
Each answer is based on scientific publications, cited at the end of the ebook: Nature, New England Journal of Medicine, Journal of Investigative Dermatology…
- Question #1 Is it really useful to protect your face all year round?
- Question #2 What are the different light rays?
- Question #3 Why are UVA rays particularly problematic?
- Question #4 What about blue light?
- Question #5 Which protection should I choose?
- Question #6 What is the effect of pollution on the skin?
- Question #7 Is it necessary to use protection in the city?
- Question #8 Is it necessary to protect yourself in front of a screen?
Preview
Three misconceptions
We believe we are safe more often than we actually are.
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Common misconception
« It's overcast, I don't need protection. »In realityUVA rays account for approximately 95% of UV radiation. They penetrate clouds, and their intensity varies little from one season to the next. They are responsible for skin aging.
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Common misconception
« I spend my days inside. »In realityUVA rays pass through certain types of glass. An office near a window, a car commute: the exposure is there, every day.
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Common misconception
« My foundation already contains SPF. »In realityYour foundation is labeled SPF50. At the amount you actually apply, it acts like an SPF15. And SPF only measures UVB rays: protection against UVA rays is indicated by the PA rating.
SPF15 equivalence: Skin Cancer Foundation estimate
About us
Make sun protection an everyday habit.
Substance Of Light® started with a simple observation: many people do not protect themselves enough on a daily basis because conventional products are not very pleasant to use.
Our formulas were developed with a former CNRS researcher with over 40 years of work in photoprotection, then tested in independent laboratories. This ebook brings together what we explain every day, without the jargon.
Clara, founder of Substance Of Light®
40+
years of research in photoprotection behind our formulas
1400+
ingredients excluded from our formulas
200+
points of sale, including Le Bon Marché
Frequently Asked Questions
Before you register.
Is the ebook really free?
Yes. You will receive it in PDF format via email, immediately after your registration.
What will I receive next?
A few emails to go further: a mechanism explained, an application tip, an answer to our most frequently asked questions. From time to time, our new products and offers. One click is all it takes to unsubscribe.
I did not receive the email.
Check your spam folder or the Promotions tab. If it's not there, email us at hello@substanceoflight.com.
Should we already be using your products?
No. The ebook is for anyone who wants to understand what light does to their skin, regardless of their current routine.
Better protection begins with better understanding.
The ebook is free. It will arrive in your inbox a few moments after you sign up.