A scientific experiment by Chinese researchers shows that catechins in green tea can effectively dilute and remove chloasma, which has obvious cosmetic effect.
Three experts, including Wang Yuefei from the Tea Department of Zhejiang University, recently conducted a comparative consumption test of catechin preparations on 65,438+000 subjects with chloasma. The results showed that the total effective rate of catechin in removing chloasma was as high as 56%. After eating catechin, the color of chloasma decreased by 28.3% on average, and the area of chloasma decreased by about 3.75 square centimeters on average, which was obviously improved compared with that before eating. In addition, after testing, experts found no adverse reactions such as allergic reactions, and the blood picture and liver and kidney functions of the subjects who continued to eat catechin were normal, further proving that it was safe to eat and harmless to human health.
Scientific research has proved that beauty spot removal has a great relationship with anti-oxidation.
Oxygen free radicals are constantly produced and eliminated in human body. When the body's antioxidant capacity drops, it will form too many free radicals. Healthy young skin can regulate the generation of skin free radicals, eliminate redundant free radicals and balance free radicals in the skin. With the increase of age or the change of constitution, the activity of enzymes that scavenge oxygen free radicals in the skin decreases, and the content of antioxidants decreases, so the free radicals in the skin will be out of balance. Excessive free radicals will decompose collagen and elastin which support the dermis, leading to the degradation of these two protein, making the skin lose its tension and elasticity, thus producing wrinkles. Free radicals oxidize unsaturated fatty acids in the skin, form lipoid brown pigment and accumulate under the skin, which will produce sunburn, chloasma and senile plaque on the skin surface. Free radicals can also cause poor microcirculation of subcutaneous blood, disordered nutrient supply of skin cells, and dry and dull facial skin. Therefore, only by constantly providing the body with antioxidants that can eliminate free radicals, so that the body has sufficient antioxidant capacity, promotes the oxidative decomposition of lipofuscin that forms brown spots, improves the activity of lysosomal enzymes, and accelerates the degradation of melanin, can we achieve the purpose of nourishing from the inside and eliminating pigmentation.
Catechin and caffeine are two important functional components in tea, and catechin is the most important component in tea soup. Catechin (TP), which is rich in tea polyphenols, has strong ability of scavenging free radicals and antioxidation, and has obvious inhibitory effect on eliminating stains.
Wang Yuefei and others demonstrated that tea polyphenols can effectively absorb ultraviolet rays, inhibit the activation of melanocytes and inhibit the formation of free radicals in the paper submitted to the just-concluded 2004 annual meeting of China Tea Society. On the other hand, tea polyphenols are also good free radical scavengers, which can prevent lipid oxidation and thus reduce pigmentation. As a reducing agent, tea polyphenols can also inhibit the activities of tyrosinase and catalase that cause skin blackening, freckles, brown spots and senile plaques, thus effectively inhibiting the production of spots and pigments. Therefore, as the main component of green tea, it has obvious skin whitening effect.
There are many benefits of green tea, and sisters should all know it! After washing away dirt and grease with ordinary facial cleanser, you can wash your face with green tea, which can help your skin increase cell activity. Because green tea has antioxidant effect, it can fade spots, soften skin and calm acne and redness on the face.
In addition, tannic acid contained in green tea can shrink skin and increase the strength of skin mucosa, which is very suitable for summer use. When washing, we must pay attention to the way of tapping gently, so that the effective components of green tea can penetrate into the skin, once a day, once in the morning and once in the evening, so as to get good results.
Materials:
Green tea: 3-5g, water.
Choose tea residue with mild pH, too acidic and too alkaline is not good for the skin.
Practice and usage: make a pot of tea 15 minutes. When the color of the tea leaves is obviously soaked, pour the tea residue into the washbasin filled with water. Then pat the facial skin with tea and wash it several times. Remember to wash your face with tea before washing your face with water.