L'oreal

Dang-Man Pham

Quang Lan Nguyen

Julien Laboureau

Isabelle Afriat

Veronique Chevalier

Boudiaf Boussouira

Florence Chanvin

The present invention relates more specifically to a cosmetic treatment method intended in particular to improve the appearance of the skin and/or hair comprising the simultaneous and/or sequential administration: In particular, the said light radiation exhibits at least one predominant wavelength which activates cytochrome C oxidase ranging from 550 to 1000 nm, in particular from 550 to 800 nm, preferably from 620 to 700 nm and more preferably still from 640 to 680 nm and is preferably used at a dose ranging from 0.01 to 200 J/cm, preferably from 0.1 to 30 J/cm, more preferably from 1 to 30 J/cm, indeed even from 5 to 30 J/cm. The invention also relates to a composition comprising at least one cytochrome C oxidase substrate and/or one agent which increases the expression of the said substrate and at least one compound emitting and/or filtering, in particular under exposure to light, a light radiation exhibiting at least one predominant wavelength which activates cytochrome C oxidase, and to a kit comprising at least one composition comprising at least one cytochrome C oxidase substrate and/or one agent which increases the expression of the said substrate and one device and/or one compound emitting/filtering a light radiation exhibiting at least one predominant wavelength which activates cytochrome C oxidase.

Combination of a light ray with a cytochrome C oxidase substrate particularly for improving the appearance of the skin and/or hair

The invention relates to the combination of a light ray with a cytochrome C oxidase substrate for improving the appearance of the skin and/or the hair.

Compositions comprising, in a physiologically acceptable medium, N-cholesteryloxycarbonyl-4-para-aminophenol and hydroquinone or one of its derivatives may be used for depigmenting and/or lightening the skin, the body hair, and/or the head hair by applying such a composition to the skin, the body hair, and/or the head hair.

Composition based on N-cholesteryloxycarbonyl-4-para-aminophenol and hydroquinone or one of its derivatives

A product suitable for topical application to skin, containing at least one enzyme which is a lipase, at least one precursor of a vitamin used in cosmetics and/or dermatology, which is an ester comprising at least one ester function with a linear or branched, saturated or unsaturated chain containing from 2 to 25 carbon atoms, and at least one C.sub.6 to C.sub.22 alcohol, where the weight ratio between the alcohol and the precursor is from 0.25 to 30/1, with the exception of alcohol/precursor combinations consisting of (1) cetyl alcohol/ascorbyl palmitate with a weight ratio of 4/1, and (2) stearyl alcohol/retinyl palmitate with a weight ratio of 1/0.6. According to a preferred form of the invention, the precursor and the lipase are packaged so as not to be in contact with each other until they are applied to the skin.

Topical application product containing a lipase, a vitamin precursor and

A synegistic system based on a phosphonic acid derivative and on a metabisulphite, for stabilizing ascorbic acid. The invention also relates to compositions, in particular cosmetic and dermatological compositions, containing ascorbic acid and this stabilizing system, and to the use of these compositions in the cosmetics and/or dermatological fields.

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Sucy en Brie, France

Dang-Man Pham