Lightinderm

Lightinderm is a French skincare-technology brand based in Paris, built around a home photobiomodulation device that pairs LED light with photo-active serum capsules. It was created by Géraldine Decaux and Professor Jean-Alexis Grimaud at Cochin Hospital in Paris. The company remains active: its device and serum capsules are sold through Le Bon Marché and the brand's own e-shop.

The idea grew out of a personal experience. According to Decaux, the brand began after she recovered from a skin cancer caused by too much sun exposure. During visits to dermatologists she came across what she calls "the paradox of light" — the observation that while ultraviolet rays damage the skin, certain other wavelengths can prompt the deeper skin tissues to regenerate themselves [1]. Working with a team of doctors and scientists led by Professor Grimaud, she set out to turn that effect into an at-home treatment.

Sources differ on the founding year. A business database records that the company was created in 2013 [5]; a separate web summary points to 2010 [1]. The 2013 date is the more consistently corroborated, and it sits comfortably with the brand's account of roughly seven years of research before a commercial launch around 2020 to 2021 [3]. Decaux, an ESSEC business-school graduate, is the founder; Grimaud, a medical doctor, served as scientific lead. Development took place on the premises of Cochin Hospital in Paris, where the founding team is described as including cellular biologists, biochemists and engineers alongside the doctors [3].

The brand's premise is that professional-grade light therapy, normally found in dermatology clinics, can be adapted for daily use at home. The company says its purpose is to bring dermatologists' technologies into people's hands so they can manage the health of their own skin. Lightinderm sits at the prestige end of the market, and its device is distributed through several channels: dermatologist or cosmetic-surgeon prescription, pharmacies, the Le Bon Marché department store, and the brand's online shop [3].

The central product is a handheld device that the brand presents as a replacement for the serum step of a skincare routine, used on clean, dry skin for about three minutes per session. It works only in combination with single-use serum capsules: the device recognises the inserted capsule automatically and runs the matching light programme. The capsules contain photo-active ingredients, among them photolyase, an enzyme that responds to light [2]. The range covers six targeted programmes and serums — Lift, Repair, Redness Relief, Brightening, Purity and Eye. The device itself was designed by the French industrial designer Mathieu Lehanneur.

Lightinderm describes the approach as photobiomodulation, combining three actions: regenerating light, the photo-active serum capsules, and massage movements [1]. The company holds a patented version of this method [1].

The brand grounds its product in an extended research programme. By its own account, the device required around seven years of research, 450 in-vitro tests, seven clinical studies and 36 patents [3]. A later interview gives somewhat different figures, citing development "over 10 years" and 12 clinical trials [2] — the two accounts are not identical. The company also states that its system delivers three times the effectiveness of a reference serum [3], and that the device is prescribed by a community of more than 60 French dermatologists [2].

In 2022 the company reported raising 5 million euros, with plans to expand across Europe that year and into China from 2023 [3]. That year it was also profiled by ESSEC Alumni, the magazine of the founder's business school.

Lightinderm is active. Its device and serum capsules are currently retailed at Le Bon Marché and on the brand's website, and the product catalogue remains live.