Tea, which is a popular drink, also often appears in cosmetics. According to Mintel's new product database, as early as 2016, green tea has become one of the skin care ingredients most familiar to Chinese people. In the years of development, the types of tea in cosmetics have become more and more diversified, and have gradually become a mainstream plant skin care ingredient.
Many brands on the market will specifically launch tea series of skin care products. At the same time, many marketing accounts are also promoting the effects of drinking tea for beauty, acne removal, and weight loss. In people's perception, there has always been an equal sign between tea and health and beauty. Therefore, the use of tea extract in cosmetics, in addition to its efficacy in the formulation, also emotionally conforms to the needs of consumers.
Enligt litteraturuppgifter finns det mer än 4000 aktiva föreningar i te, och polyfenoler står för mer än en tredjedel. Tepolyfenoler, även kända som katekiner, är en av de viktigaste antioxidantkomponenterna i teextrakt. I kategorin katekiner är komponenten med den starkaste antioxidantaktiviteten epigallocatechin 3-gallate (EGCG). ).
In 2019, a review published in the "Molecule" magazine made a very detailed comparison and summary of the antioxidant properties of various tea ingredients. It is mentioned that among the various tea ingredients, green tea contains the most abundant EGCG, followed by oolong tea and black tea; in addition, the active ingredients of tea have the effects of photoprotection and fat reduction in addition to anti-oxidation.
Dessutom, eftersom teextraktet innehåller tepolyfenoler och koffein, har det också en viss effekt på att minska celluliter. Kliniska prövningar har visat att cirka 3-4 koppar grönt te (600-900 mg tepolyfenoler) per dag avsevärt kan minska den totala fetthalten i buken hos patienter med fetma 3.
Forskningen om effektiviteten av teextrakt är relativt omfattande och tydlig, men det finns vissa begränsningar i dess tillämpning. Å ena sidan, som växtextrakt, varierar innehållet av den aktiva ingrediensen i själva teextraktet, och det finns ingen tydlig referensstandard för dess appliceringskoncentration i produkten.