Monounsaturated fatty acid for preventing and/or treating skin complexion imperfections

1. A cosmetic method for revealing the radiance of the skin complexion comprising orally administering an effective amount of at least one monounsaturated fatty acid, a salt thereof and/or an ester thereof to a subject in need thereof, said complexion being affected by excessive secretion of sebum.

2. The method of claim 1 , in which the skin is the skin of the face, the neck and/or the neckline.

3. The method of claim 1 , in which said monounsaturated fatty acid, salt thereof and/or ester thereof is used in an isolated form or in a plant extract.

4. The method of claim 1 , in which the monounsaturated fatty acid, salt thereof and/or ester thereof is used in an oral composition, and in which the content of said monounsaturated fatty acid, salt thereof and/or ester thereof is such that the daily dose ranges from 0.5 to 2500 mg/day.

5. The method of claim 1 , in which said monounsaturated fatty acid is petroselinic acid.

6. The method of claim 5 , in which said petroselinic acid is used in the form of an oil from an Umbellifera plant or from Geranium sanguineum.

7. The method of claim 6 , in which said Umbellifera plant oil is chosen from the seed oils of coriander, chervil, carrot, celery, cumin, caraway, parsley and dill, and mixtures thereof.

8. The method of claim 1 , in which said monounsaturated fatty acid is used in combination with at least one additional cosmetic active agent, chosen from vitamin B3, B5, B6, B8, C, or E, carotenoids, curcuminoids, niacin, flavonoids, one or more divalent mineral cations, bacteria or bacterial extracts derived from non-photosynthetic, filamentous bacteria, and probiotic microorganisms.

9. The method of claim 8 , in which said probiotic microorganism is chosen from microorganisms of the genus Lactobacillus or Bifidobacterium.

10. The method of claim 8 , in which the probiotic microorganism is a lactic acid bacterium.