Preparation for external application to skin and cosmetic preparation

Abstract

Disclosed is a preparation for external application to skin, which contains a branched acylcarnitine and has excellent preparation stability. Also disclosed is a cosmetic preparation. Specifically disclosed is a preparation for external application to skin, which is characterized by containing a carnitine derivative represented by Formula (1) and / or a carnitine derivative salt represented by Formula (2) and an amphoteric surfactant. In Formula (1), R1 and R2 independently represent an optionally branched, saturated or unsaturated aliphatic hydrocarbon group having 1-18 carbon atoms. In Formula (2), R1 and R2 are as defined in Formula (1); X- represents a specific anion; and Y+ represents a specific cation.

Description

technical field The present invention relates to skin external preparations and cosmetics. More specifically, it relates to a stable external skin preparation and a cosmetic containing a carnitine derivative and / or a salt thereof and a specific surfactant, and having excellent formulation stability. Background technique Carnitine is known to play an important role in lipid metabolism in the human body. Carnitine binds to fatty acids freed from fat through the action of enzymes in cells, and thus plays the role of a carrier for transporting fatty acids in mitochondria, the organelles that are the site of lipid burning. On the other hand, the existence of excess lipid will cause a lot of problems especially from the point of view of beauty and QOL (Quality Of Life): not only will it cause obesity caused by accumulation of subcutaneous fat, but it will also cause cellulite formation, sebum Oily and / or sticky skin surface caused by excess, seborrheic dermatitis, hair loss cau...

AI Technical Summary

Problems solved by technology

On the other hand, the existence of excess lipid will cause a lot of problems especially from the point of view of beauty and QOL (Quality Of Life): not only will it cause obesity caused by accumulation of subcutaneous fat, but it will also cause cellulite formation, sebum Oily and / or sticky skin surface due to excess, seborrheic dermatitis, hair loss due to seborrheic dermatitis, acne, body odor, skin aging due to low lipid metabolism, etc.

Images