2results about How to "Improves pigmentation" patented technology

This invention relates to a whitening extract from Camellia yunnanensis, its preparation method, and its applications, belonging to the field of plant extract preparation and cosmetic technology. The extraction method includes: preparing a eutectic solvent by mixing choline chloride and citric acid in a molar ratio of 1:1 to 1:5, and adjusting the water content to 40%–80%; mixing Camellia yunnanensis raw material powder with the eutectic solvent at a material-to-liquid ratio of 1:10–30 (g / mL), and performing ultrasound-assisted extraction. This extract can be used to prepare cosmetics or topical skin preparations with whitening, brightening, antioxidant, or pigmentation-improving effects, as well as tyrosinase activity inhibitors and α-amylase activity inhibitors. This invention provides a green and efficient method for extracting the whitening active ingredients from Camellia yunnanensis.

The application provides a multi-layer penetration controlled-release acid preparation and a preparation method thereof, and belongs to the field of cosmetics. The preparation is composed of Aspergillus oryzae fermentation substrate freeze-dried powder, composite alpha-hydroxy acid, salicylic acid, poloxamer 407, polyhydric alcohol and non-ionic surfactant. The freeze-dried powder is obtained by co-fermenting olea europaea leaves and curcuma and refining through ultrafiltration. A temperature-sensitive phase change system is constructed by using poloxamer, so that the product is changed from a liquid state to a gel state at body temperature, and the synergistic controlled release of acid components and bioactive substances is realized. The preparation process adopts low-temperature swelling and vacuum freeze-drying technology, so that the stability of the system and the efficiency of the active substances are ensured. The application significantly reduces the irritation of high-concentration acid, improves the black suppression and repair effect, and is suitable for precise improvement of hyperpigmentation problems such as chloasma.