The present invention describes methods for improving the appearance of skin, particularly, treating, ameliorating, preventing, delaying, and/or improving one or more signs of aging, by topically applying compositions comprising an extract of Medemia nobilis.
1. A composition for stimulating collagen, pro-collagen or hyaluronic acid production in the skin of a subject, said composition comprising from 0.075% to 1.25% by weight of a protic solvent extract of Medemia nobilis , a cosmetically acceptable vehicle, and a preservative selected from the group consisting of disodium EDTA, phenoxyethanol, methyl paraben, ethyl paraben, propyl paraben, imidazolidinyl urea, sodium dehydroacetate, para-hydroxybenzoic acid, hydantoin derivatives, propionate salts, quaternary ammonium compounds, benzyl alcohol, an butylated hydroxytoluene (BHT).
2. The composition according to claim 1 , wherein said cosmetically acceptable vehicle comprises from about 2% to about 98% by weight water.
3. The composition according to claim 1 , wherein said preservative comprises disodium EDTA.
4. The composition according to claim 1 , wherein said preservative comprises phenoxyethanol.
5. The composition according to claim 1 , wherein said preservative comprises methyl paraben.
6. The composition according to claim 1 , wherein said preservative comprises ethyl paraben.
7. The composition according to claim 1 , wherein said preservative comprises propyl paraben.
8. The composition according to claim 1 , wherein said preservative comprises imidazolidinyl urea.
9. The composition according to claim 1 , wherein said preservative comprises sodium dehydroacetate.
10. The composition according to claim 1 , wherein said preservative comprises para-hydroxybenzoic acid.
11. The composition according to claim 1 , wherein said preservative comprises propionate salts.
12. The composition according to claim 1 , wherein said preservative comprises quaternary ammonium compounds.
13. The composition according to claim 1 , wherein said preservative comprises benzyl alcohol.
14. The composition according to claim 1 , wherein said preservative comprises butylated hydroxytoluene (BHT).
15. The composition according to claim 1 , wherein said preservative comprises hydantoin derivatives.
16. The composition according to claim 1 , wherein said vehicle is in the form of an emulsion stabilized with an emulsifier.
17. The composition according to claim 1 , wherein said composition further includes an ingredient selected from retinoids, N-acetyl tyrosinamide, thiodipropionic acid (TDPA), glycolic acid, and salicylic acid.
18. The composition according to claim 1 , wherein said protic solvent extract is an ethanolic extract.