L'oreal

Societe L'oreal Sa

Quang Lan Nguyen

Boudiaf Boussouira

Julien Laboureau

Dang-Man Pham

Jean-Thierry Simonnet

Alain J Ribier

Paolo Giacomoni

Stephanie Prince

Dominique Bernard

Isabelle Afriat

Francis Pruche

Christian Colin

Florence Chanvin

Jean-Francedillaois Nadaud

Jean-Pascal Hirt

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 present invention relates to the use of a source of green light for activating L-amino acid oxidase in the presence of at least one substrate of this enzyme in order to stimulate the energy metabolism of the cells of the skin, to stimulate their replacement and thus to improve the appearance of the skin and hair, in particular to prevent and/or treat cutaneous signs of ageing of the skin and hair.

Use of green light to activate L-amino acid oxidase

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.

A substrate is filled with a reagent that presents a stable free radical character, and that is capable of producing a visible reaction in the presence of at least one free radical scavenger analyte of the skin.

Method of evaluating the potential of the skin for scavenging free radicals

A composition comprising the combination of at least one retinoid selected from the group consisting of vitamin A (retinol) and the bioconvertible precursors of vitamin A and at least one polyamine polymer.

Combination of a retinoid with a polyamine polymer

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.

System for stabilizing ascorbic acid based on a phosphonic acid

Cosmetic and/or dermatological compositions containing a non-photocatalytic metal oxide and tocopherol and, optionally, a metal-inactivating complexing agent are effective for inhibiting the light-induced peroxidation of lipids, and in particular lipids of sebaceous origin such as squalene.

Composition containing a non-photocatalytic metal oxide and tocopherol,

Topically applicable dermocosmetic compositions for whitening/depigmenting human skin, comprise a skin-whitening/depigmenting effective amount of at least one melatonin derivative having the structural formula (I): in which R.sub.1 is a lower alkyl radical, R.sub.2 is a hydrogen atom or a lower alkyl radical, and R.sub.3 is a hydrogen atom or a lower acyl radical, with the proviso that the hydroxyl radical is in the 4-, 6- or 7-position on the indole ring system, or a physiologically acceptable salt, solvate or bioprecursor/prodrug thereof, formulated into a topically applicable, cosmetically/dermatologically acceptable vehicle, carrier or diluent therefor.

Melatonin derivative dermocosmetic compositions for

Composition containing a non-photocatalytic metal oxide and tocopherol

The invention relates to the use of a spin trap employed as an electron paramagnetic resonance measurement probe, in a cosmetic or dermatological composition for the light-protective, anti-ageing and/or anti-acne treatment of the skin. In particular, this spin trap is encapsulated in lipid vesicles which are capable of diffusing into the deep layers of the skin.

Use of a spin trap in a cosmetic or dermatological composition

The invention relates to a cosmetic and/or dermatological composition comprising at least one superoxide dismutase and at least one porphyrin. In a composition of this kind the porphyrin synergically reinforces the anti-free radical action of the superoxide dismutase. The composition is used in particular to combat cell ageing and/or for the protection of the skin, hair and/or mucosae against the harmful and/or unaesthetic effects caused by oxygen-containing free radicals.

Cosmetic composition containing a superoxide dismutase and a porphyrin

A stabilized composition capable of releasing an active agent in contact with the skin, contains at least two precursors of this same active agent, capable of simultaneously releasing this active agent by at least two different specific enzymatic reactions in order to release a large amount of active agent at a faster rate than the sum of the rates of the first enzymatic reaction and of the second enzymatic reaction taken separately, the first precursor being chosen from active agent monosaccharide derivatives and active agent amides. The composition is useful for dermatological and/or cosmetic treatments applied topically.

Growing community of inventors

Antony, France

Quang Lan Nguyen