Moisturizer and cosmetic including the same
Moisturizers including an acyl neutral amino acid having an acyl group with a carbon atom number of 2 to 18, and salts thereof, and cosmetics containing such a moisturizer promote the production of moisturizing-related proteins, such as filaggrin, involucrin, transglutaminase 1, keratin 10, and loricrin, and provide a moisturizing effect.
1. A moisturizer, comprising at least one acyl neutral amino acid having an acyl group having a carbon atom number of 2 to 10 or a carbon number of 12 or a salt thereof.
2. The moisturizer according to claim 1 , wherein said acyl neutral amino acid is an acyl leucine, an acyl isoleucine, an acyl valine, an acyl glycine, or an acyl alanine.
3. The moisturizer according to claim 1 , wherein the carbon atom number of the acyl group is 12.
4. The moisturizer according to claim 1 , wherein the carbon atom number of the acyl group is 2 to 10.
5. The moisturizer according to claim 1 , wherein the carbon atom number of the acyl group is 8.
6. The moisturizer according to claim 1 , wherein the acyl neutral amino acid is one or more compounds selected from the group consisting of an acyl valine, an acyl glycine, and an acyl alanine.
7. The moisturizer according to claim 1 , wherein the moisturizer promotes production of one or more moisturizing-related proteins selected from the group consisting of filaggrin, involucrin, transglutaminase 1, keratin 10, and loricrin.
8. The moisturizer according to claim 1 , wherein the moisturizer reduces growth of an inflammatory cytokine.
9. A cosmetic, comprising a moisturizer according to claim 1 .
10. An external preparation for skin, comprising a moisturizer according to claim 1 .
11. A method for moisturizing skin, comprising applying to skin of a subject in need thereof an effective amount of at least one acyl neutral amino acid having an acyl group having a carbon atom number of 2 to 10 or a carbon number of 12 or a salt thereof.
12. The method according to claim 11 , wherein said acyl neutral amino acid is an acyl leucine, an acyl isoleucine, an acyl valine, an acyl glycine, or an acyl alanine.
13. The method according to claim 11 , wherein the carbon atom number of the acyl group is 12.
14. The method according to claim 11 , wherein the carbon atom number of the acyl group is 2 to 10.
15. The method according to claim 11 , wherein the carbon atom number of the acyl group is 8.
16. The method according to claim 11 , wherein the acyl neutral amino acid is one or more compounds selected from the group consisting of an acyl valine, an acyl glycine, and an acyl alanine.
17. A method for promoting production of one or more moisturizing-related proteins selected from the group consisting of filaggrin, involucrin, transglutaminase 1, keratin 10, and loricrin, comprising applying to skin of a subject in need thereof an effective amount of at least one acyl neutral amino acid having an acyl group having a carbon atom number of 2 to 10 or a carbon number of 12 or a salt thereof.
18. The method according to claim 17 , wherein said acyl neutral amino acid is an acyl leucine, an acyl isoleucine, an acyl valine, an acyl glycine, or an acyl alanine.
19. The method according to claim 17 , wherein the carbon atom number of the acyl group is 12.
20. The method according to claim 17 , wherein the carbon atom number of the acyl group is 2 to 10.
21. The method according to claim 17 , wherein the carbon atom number of the acyl group is 8.
22. The method according to claim 17 , wherein the acyl neutral amino acid is one or more compounds selected from the group consisting of an acyl valine, an acyl glycine, and an acyl alanine.
23. A method for reducing growth of an inflammatory cytokine, comprising applying to skin of a subject in need thereof an effective amount of at least one acyl neutral amino acid involving having an acyl group having a carbon atom number of 2 to 10 or a carbon number of 12 or a salt thereof.
24. The method according to claim 23 , wherein said acyl neutral amino acid is an acyl leucine, an acyl isoleucine, an acyl valine, an acyl glycine, or an acyl alanine.
25. The method according to claim 23 , wherein the carbon atom number of the acyl group is 12.
26. The method according to claim 23 , wherein the carbon atom number of the acyl group is 2 to 10.
27. The method according to claim 23 , wherein the carbon atom number of the acyl group is 8.
28. The method according to claim 23 , wherein the acyl neutral amino acid is one or more compounds selected from the group consisting of an acyl valine, an acyl glycine, and an acyl alanine.