Cosmetic compositions
A method of reducing the appearance of hyperpigmented skin or inflamed skin is disclosed. The method can include topically applying to hyperpigmented skin or inflamed skin a composition comprising an effective amount of an extract of Rhododendron ferrugineum leaf to reduce melanocyte pigmentation in the skin or to reduce tumor necrosis factor alpha (TNF-α) and cyclooxygenase-1 and -2 (COX-1 and COX-2) activity in the skin.
1. A method of reducing the appearance of hyperpigmented skin, the method comprising topically applying to hyperpigmented skin a composition comprising 0.001 wt. % to 0.5 wt. % of an aqueous and/or glycerin extract of Rhododendron ferrugineum leaf to reduce melanocyte pigmentation in the skin.
2. The method of claim 1 , wherein the hyperpigmented skin is a dark spot on the skin associated with aging.
3. The method of claim 1 , wherein the hyperpigmented skin is skin having an uneven skin tone.
4. The method of claim 1 , wherein the hyperpigmented skin comprises inflamed skin, wherein the composition is applied to the inflamed skin, and wherein TNF-α, COX-1, and COX-2 activity in the skin is reduced.
5. The method of claim 1 , wherein the composition is an emulsion.
6. The method of claim 5 , wherein the emulsion is an oil-in-water emulsion.
7. The method of claim 1 , wherein the composition is a cream or lotion.
8. The method of claim 1 , wherein the composition is an aqueous solution or a gel.
9. The method of claim 1 , wherein the composition consists of the extract of Rhododendron ferrugineum leaf, water, and glycerin.
10. The method of claim 1 , wherein the composition further comprises a pH adjuster.
11. The method of claim 10 , wherein the composition consists of the extract of Rhododendron ferrugineum leaf, water, glycerin, and the pH adjuster.
12. The method of claim 1 , wherein the composition consists of the extract of Rhododendron ferrugineum leaf and caprylic/capric triglyceride.
13. The method of claim 1 , wherein the extract of Rhododendron ferrugineum leaf is an aqueous extract.
14. The method of claim 1 , wherein the extract of Rhododendron ferrugineum leaf is an aqueous and glycerin extract.