Green tea and skin health
The brewing method of green tea (as opposed to the fermentation process of black tea) ensures that large amounts of the polyphenolic antioxidants in the plant remain in the drink.
Tea is the drink of 3/4 of the world’s population, and people in Western countries drink mostly black tea, and the majority of Chinese drink green tea.
There are usually five types of green tea, black, oolong tea, red and white tea on the market, which are different in terms of processing methods and white tea.
Unlike all types of black tea, green tea is made from the fresh leaves of the plant and is dried before any oxidation of phenolic compounds.
The brewing method of making green tea (as opposed to the fermentation process of black tea) ensures that large amounts of the polyphenolic antioxidants in the plant remain in the drink.
Green tea has long been used as a traditional medicine in Southeast Asian cultures.
Both oral and topical formulations of green tea have the potential to protect against light exposure to prevent and repair the effects of excessive sunlight.
There is some evidence that antioxidants such as green or black tea polyphenols reduce the allergic reaction and skin epithelial cancer.
These effects are thought to be mainly due to epicatechins, water-soluble polyphenolic compounds in green tea, although other compounds in green tea or black tea, including caffeine, flavonoids, and alkaloids, also have chemically inhibitory effects. .
The polyphenols in green tea are also found in black tea, but are present in smaller amounts in black tea due to oxidation in the production process.
Improves skin cancer
Due to the fact that the skin is most exposed to sunlight, most of the harmful effects of ultraviolet light are often seen in this organ.
Preliminary studies have been performed to evaluate the protective effects of green tea radiation on skin cancer.
Prolonged exposure to light leads to squamous cell carcinoma of the skin.
Researchers have found that green tea extract dissolved in drinking water can prolong the incidence and incidence of tumors and reduce the incidence of tumors caused by intense light.
These results confirmed the incidence, number of tumors, growth and size of the tumor in oral and topical use of green tea.
Topical and oral application of green tea causes partial recurrence or inhibition of skin tumor growth. The stages of skin tumor formation caused by light radiation include the stages of onset, progression and continuation, and it has been proven that green tea extract has protective effects in each of these stages.
Improve premature aging
Premature aging of the skin caused by light radiation is another complication related to sunlight. Premature aging caused by light radiation is the main cause of financial costs for consumers.
Recently, prevention strategies have focused on avoiding exposure to sunlight and the use of skin creams and lotions, but the use of these approaches has been limited due to their relatively low effectiveness, inadequate use, and adherence to a small number of patients.
Green tea is one of the factors that have been considered in terms of its benefits of protection against light radiation.
In a study of premature aging due to light radiation, topical application of green tea lotions significantly reduced the amount of skin wrinkles and reduced the breakdown of skin proteins as a sign of premature aging.
Reduce sunburn
Using a medicinal compound made from green tea extract reduces the sunburn reaction, a painful reaction caused by acute and excessive exposure to light in humans.
Improved safety
Another cause of the effects of light radiation is the inhibition of immunity caused by it. Ultraviolet radiation inhibits local immunity by inhibiting the function of antigen-supplying cells in the skin.
Topical application of green tea both before and immediately after exposure to light radiation eliminates the effects of immunosuppressants.
Reduce skin cell death
Skin tests after acute exposure to light can lead to large numbers of sunburn cells.
Topical application of green tea lotions has been shown to reduce skin cell death and reduce the number of sunburned cells.
Green tea can also save damaged and deformed skin cells.
Protection against damage to genetic material
Light-induced changes can cause mutagenicity, tumorigenesis, and lethal effects on skin cells.
Green tea polyphenols have been shown to be very effective in reducing genetic damage to the skin.
Reduce oxidative stress
Exposure to light can disrupt complex mechanisms for defending against oxidative stress.
In a study of premature aging due to light radiation, topical application of green tea lotions significantly reduced the amount of skin wrinkles and reduced the breakdown of skin proteins as a sign of premature aging.
This can lead to increased oxidative stress and depletion of antioxidant enzymes. Studies on human post have shown that green tea polyphenols can prevent UV-induced damage.
The results of another study showed that green tea reduces the release of intracellular hydrogen peroxide (a compound harmful to the body).
Topical or oral use of green tea also prevents the depletion of antioxidant enzymes and also prevents the degradation of proteins caused by light radiation.
Improve other skin disorders
The anti-cancer and anti-radiation potential of green tea has been well studied. Green tea can also be an alternative treatment for other skin disorders such as psoriasis, skin cancer, keratosis, keratosis d tumors, idol purpura, rhizospora. (Chronic skin disorder with red lesions on the nose and forehead).
Green tea can be an effective treatment for psoriasis as it can enhance the differentiation and formation of skin barriers.
In general, it is recommended to consume three cups of green tea daily because the amount of antioxidants in it, including its catechins, is much higher than black tea and has beneficial properties on the heart and arteries and overall health of the body.