External preparation for skin

a technology of external preparation and skin, applied in the field of external preparation for skin, can solve the problems of hair loss, split ends, etc., and achieve the effects of improving the turnover of corneum, excellent skin-beautifying effect, and preventing/ameliorating skin roughness

Inactive Publication Date: 2009-05-21
SBI PHARMA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]Though it has been known that 5-aminolevulinic acids are used as herbicides, plant growth regulators, external preparations for head, etc., an external preparation for skin for making beautiful skin which contains 5-aminolevulinic acids and the effects of 5-aminolevulinic acids on skin roughness, etc., have not been known. The object of the present invention is to provide an external preparation for skin which contains 5-aminolevulinicacids as active components and having excellent skin-beautifying effects such as prevention / amelioration of skin roughness, dry skin, wrinkles, sagging and flecks of skin, and improvement of turnover of corneum; and an ameliorating effect on skin diseases such as atopic dermatitis.Means for Attaining the Object
[0012]The present inventor has conducted a keen study and found out that a mixture of 5-aminolevulinic acids and iron compounds have: skin-beautifying effects such as prevention / amelioration of skin roughness, dry skin, wrinkles, sagging and flecks of skin, and improvement of turnover of corneum; and an ameliorating effect on skin diseases such as atopic dermatitis. The present invention has been thus completed.

Problems solved by technology

Conventionally known external preparations for head (hair restorers) containing 5-aminolevulinic acids as active components cannot be used stably because of the following reasons: they cause damages to hair when they are not used in accordance with the direction of their dosage and administration, resulting in problems such as split ends and a decrease in the number of hairs, and in addition, light shielding at the point of use is an absolute requirement.

Method used

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  • External preparation for skin
  • External preparation for skin

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0062]1.5 g of 5-aminolevulinic acid hydrochloride, 3 g of urea and 1 g of ferrous citrate were mixed well into 20 ml of purified water in which 4% of 1,3-butylene glycol and 0.15% of methylparaben had been dissolved, to prepare the formulation example 1 was prepared.

[0063]About 2 ml of the formulation example 1 was applied every night to faces of subjects (8 adult women). After application, the faces were left for 30 minutes to 1 hour, and then the faces were washed in the same night, to rinse off the formulation example.

[0064]The conventional strict light shielding conditions, applied when 5-aminolevulinic acids are used alone, were not performed, and hair removal occurring when the dosage is partially excessive was not observed. The formulation example 1 was evaluated 5 days after the start of the application by each of 8 subjects. The results are shown below.

Subject 1: only the right half of the face was treated with the formulation example 1, and the skin at the treated part be...

example 2

[0067]The formulation example 1 in Example 1 was applied once every night to affected areas of 6 patients of atopic dermatitis (subjects 9 to 13; and subject 1 in Example 1), and 2 patients of chronic eczema (subjects 14 to 15) in an amount of about 1 ml per 100 cm2 of skin. After application, the affected areas were left for 30 minutes to 1 hour, and then the areas to which the formulation example 1 was applied were washed in the same night to rinse off the formulation example. The affected areas, 1, 2 weeks after the start of the administration of the formulation example 1, were compared with the affected areas before the administration, and the judgment and the evaluation of “markedly ameliorated”“ameliorated”“no change” and “worsened” were conducted by the inventor, who is a doctor. The judgment and evaluation were conducted using the levels of amelioration of redness, pigmentation and itching of the skin, and the level of softening of the skin, as an indicator. As a result, 4 o...

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Abstract

The present invention provides an external preparation for skin which contains 5-aminolevulinic acids as active components and which is excellent in skin-beautifying effects such as prevention / amelioration of skin roughness, dry skin, wrinkles, sagging and flecks of skin, and improvement of turnover of corneum; and in an ameliorating effect on skin diseases such as atopic dermatitis. An external preparation for skin which contains one or more compounds selected from the group consisting of 5-aminolevulinic acid, its salt and a derivative of them; and an iron compound; as active components, is used.

Description

TECHNICAL FIELD[0001]The present invention relates to an external preparation for skin which is excellent in skin-beautifying effects such as prevention / amelioration of skin roughness, dry skin, wrinkles, sagging and flecks of skin, and improvement of turnover of corneum, and an external preparation for skin which is excellent in an ameliorating effect on skin diseases such as atopic dermatitis, more particularly, to an external preparation for skin wherein 5-aminolevulinic acids and an iron compound are used in combination.BACKGROUND ART[0002]Conventionally, external preparations for skin have been developed, which focused on prevention and amelioration of skin roughness. Examples of such external preparations for skin include: skin external preparations for ameliorating skin roughness which contains alum, calcium salt and magnesium salt (see Japanese Laid-open Patent Application No. 2004-284962), and an agent for preventing / ameliorating skin roughness which consists of N-α-benzoyl...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K33/26A61P17/00
CPCA61K8/44A61K31/195A61Q19/08A61Q19/007A61Q19/02A61Q19/00A61K31/295A61K31/17A61K31/197A61K2800/88A61K33/26A61K9/0014A61K47/10A61P17/00A61P17/04A61P17/16A61P37/08A61P43/00A61K2300/00A61K8/36
Inventor ITO, YOSHIYASU
Owner SBI PHARMA CO LTD
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