Frequently asked questions.

Yes, you can. Sérum Renaissance Beauté is formulated to repair the barrier and was developed primarily with sensitive skin in mind. That said, every skin is different. Before your first use, we recommend trying it on an inconspicuous area.

Apply a small amount to an inconspicuous area such as the inside of your upper arm and wait 24–48 hours. If no redness, itching or bumps appear, start by using it on part of your face. Please test Concentré Revitalisant Avancé mixed into toner or serum at 1–2 drops.

Stop using the product straight away and rinse it off with lukewarm water, without rubbing. Please avoid layering other cosmetics on top. If the symptoms continue, see a dermatologist and take the product with you.

During pregnancy and breastfeeding, skin tends to be more sensitive than usual. Mousse Purifiante Lumière contains retinyl palmitate (a vitamin A derivative). Please consult your doctor before use. The full ingredient list is published on each product page.

Cleanser (Mousse Purifiante Lumière) → toner → serums (Concentré Revitalisant Avancé and Sérum Renaissance Beauté) → cream. Serums go after toner. Until our own toner and cream are released, please use the ones you already have.

The two work in different places. Concentré addresses "oxidation (R)", at the very top of the cascade, while Sérum addresses "barrier (B)". If you use both, apply them after toner, in either order. If you would like to start with one, we recommend the CHROSNOF assessment to find out where your skin is most likely to give way first.

It is a concentrate. Take a suitable amount of Sérum Renaissance Beauté, or of your own toner or serum, in your palm, then add 1–2 drops.

All three products can be used morning and night. During the day, please finish your skincare with sunscreen.

Yes, you can. However, when starting ingredients that can feel stimulating — such as retinol or high-concentration vitamin C — please add them one at a time while watching how your skin responds, rather than starting several at once.

As a guide (this varies with the amount and frequency of use): ・Mousse Purifiante Lumière (cleanser, 120 mL): about 1.5–2 months ・Concentré Revitalisant Avancé (concentrate, 8 mL): about 1 month ・Sérum Renaissance Beauté (serum, 30 mL): about 1 month ・Essence Sérénité Profonde (essence, 100 mL, coming mid-December 2026): about 1 month The products in development — Crème Régénération Temporelle (cream, 30 g planned) and Tisane Lumière Intérieure (tisane, 30-day supply planned) — are also designed to last about 1 month.

Please work the cleanser into a full lather with the foaming net provided before use. Using the foam as a cushion lets you wash without rubbing your skin. Please avoid rubbing your face directly with the net. After use, squeeze out the water and hang it to dry; replacing it every 1–2 months keeps it hygienic.

Mousse Purifiante Lumière is designed for use both morning and night. After washing, please move straight on to toner.

The cause may be the water temperature or how you wash, not only the cleanser. Please use lukewarm water, let the foam sit on your skin rather than rubbing, and press your face dry with a towel. If it still concerns you, please contact us.

With an airless pump, the contents rise after a few presses when you first start using it. Because the contents do not touch the air, it can be hard to see how much is left from the outside. If the contents still do not come out, we will replace it — please contact us.

The skin's surface renewal cycle slows with age and is generally said to take a month or more. Please continue for at least 1–2 months before judging. For Sérum Renaissance Beauté, which restores the barrier, we suggest 4–8 weeks of continued use.

First, please review the order and amount (serums after toner; Concentré at 1–2 drops). If nothing changes after that, the direction of your care may not suit your skin. Please try the CHROSNOF assessment to see which of the six pathways is most likely to dominate for you.

We keep texture agents and thickeners — the ingredients that make a product feel pleasant on application — to a minimum. Instead, we spend that on ingredients that act on the mechanisms of aging.

Yes. In fact, many of the people who use our products are men. The mechanisms of skin aging are the same regardless of gender.

Yes. Skin is easily irritated after shaving, so please rinse with lukewarm water, press dry with a towel, and then apply toner → serum. If you feel any stinging, please skip them that day.

Once opened, please use it as soon as you can. The more it is exposed to air and light, the more easily its quality changes.

Please store them away from direct sunlight, heat and humidity, with the cap firmly closed. Keeping them in the refrigerator is fine, though the contents may become firmer. If you notice a change in smell or colour, please stop using the product.

You can buy them from each product page by adding them to your cart.

It is our own computational model of skin aging. From your lifestyle data, it analyzes which of the six pathways is most likely to dominate and shows the direction your care should take.

No — anyone can use the products. The assessment is a guide for when you are unsure where to begin.

Since our founding in 2012, our advertising spend has been zero. We put all of it into ingredients instead. We have decided that whatever we want to say, we will say through our products.

We are developing three products: a toner, a cream and a tisane. We will announce their release dates on this site once they are decided.