Method of treating human skin and a skin care composition for use in such a method
One aspect of the invention concerns a cosmetic method of treating human skin by delivering an estrogenic component to said skin. The method comprises applying to the skin a composition containing: (i) at least 5 μg/g of an estrogenic component selected from the group consisting of substances represented by the following formula (I) in which formula R 1 , R 2 , R 3 , R 4 independently are a hydrogen atom, a hydroxyl group or an alkoxy group with 1-5 carbon atoms; each of R 5 , R 6 , R 7 is a hydroxyl group; no more than 3 of R 1 , R 2 , R 3 , R 4 are hydrogen atoms; precursors capable of liberating a substance according to the aforementioned formula when used in the present method; and mixtures of one or more of the aforementioned substances and/or precursors; and (ii) a cosmetically acceptable vehicle. Other aspects of the invention relate to therapeutic methods of treating or preventing vaginal dryness or acne and a therapeutic method of promoting wound healing. Yet another aspect of the invention relates to a skin care composition comprising the aforementioned estrogenic component and a cosmetically acceptable vehicle.
1. A cosmetic method of improving wrinkled, lined, dry, flaky, aged, or photodamaged skin comprising applying to the skin a composition comprising:
(i) at least 5 μg of estetrol per g of composition; and
(ii) a cosmetically acceptable vehicle.
2. The cosmetic method according to claim 1 , wherein the composition enhances proliferation of fibroblasts and/or epidermal skin cells.
3. The cosmetic method according to claim 1 , wherein the composition improves skin thickness and/or skin elasticity.
4. The method according to claim 1 , wherein the composition contains at least 10 μg/g of estetrol.
5. The cosmetic method according to claim 1 , wherein the composition is applied to facial skin or neck skin.
6. The cosmetic method according to claim 1 , wherein the composition is applied at least once a day during a period of at least 3 days.
7. The cosmetic method according to claim 1 , wherein virtually all of the composition that has been applied to the skin penetrates the skin.
8. A method of promoting wound healing comprising applying to a wounded tissue or to tissue in a vicinity of a wound a composition comprising:
(i) at least 5 μg of estetrol per g of composition; and
(ii) a cosmetically acceptable vehicle.
9. A method of treating or preventing acne comprising applying to skin that is affected by acne or that is at risk of being affected by acne a composition comprising:
at least 5 μg of estetrol per g of composition; and
(ii) a cosmetically acceptable vehicle.
10. A pharmaceutical or cosmetic composition for topical administration comprising:
at least 5 μg of estetrol per g of composition; and
(ii) a cosmetically acceptable vehicle.
11. The cosmetic method according to claim 1 , wherein the composition is a lotion, salve or a cream.