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Healthy eating health centre The health benefits of tea A nice cup of tea is a refreshing start to the day for many people, or a welcome pick me up in the afternoon tea break. In the UK, 165 million cups of tea are consumed every day. Britain is the second biggest tea drinking nation after Ireland. Tea is made from the leaves of a bush called Camellia sinensis. For black tea, a process called oxidation turns the leaves from green to a dark brownish-black colour. Green tea comes from the same plant, but is not oxidised. Oolong tea is made from leaves of the same plant that green and black teas come from. The difference lies in how long the leaves ferment. Green tea leaves are unfermented, while leaves for black tea are fully fermented. Oolong comes from leaves that are partially fermented. But is there more to the cup of tea and any actual health benefits? We look at the evidence for the health benefits of ordinary black tea from a teapot or tea bag, and green tea. Black tea There is evidence to back the use of tea as a pick me up, it contains caffeine and a stimulating substance called theophylline. These can speed up the heart rate and make you feel more alert. Black tea extract is sold as a supplement. Black tea is also full of healthy substances called polyphenols. Polyphenols are antioxidants that can help protect your cells from DNA damage. One study found that drinking 3 cups of black tea a day lowered blood pressure, but UK experts said more research is needed to confirm the benefits. Drinking black tea may help protect against type 2 diabetes, but further studies are needed to confirm an association. Some scientists think that specific antioxidants in tea, including polyphenols and catechins, may help prevent some types of cancer. For example, some research shows that women who regularly drink black tea have a much lower risk of ovarian cancer than women who do not. More research is needed to confirm this. So far, research has shown that black tea does not lower the risk of breast, stomach, or colorectal cancer. There is some evidence that the antioxidants in black tea may reduce atherosclerosis or clogged arteries and help lower the risk of heart attack. Regularly drinking black tea may reduce stroke risk and also lower your risk of these conditions: - Diabetes - High cholesterol - Kidney stones - Parkinson’s disease But more research about black tea's effect on these conditions is needed to be sure. Early evidence hints that long-term use of black tea may also help protect against osteoporosis and lung cancer, but larger-scale studies are needed to confirm these uses. As well as possible health benefits of back tea, some research suggests that post- menopausal women who drink tea may have a higher risk of developing rheumatoid arthritis than non-tea drinkers.
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Ne morate piti samo vodu u toku dana da biste bili zdravi. Vodu možete da zamijenite i sa crnim čajem koji jednako zdravo djeluje na organizam kao i voda. Crni čaj rehidrira organizam i sprječava pojavljivanje nekih vrsta teških bolesti. Crni čaj sadrži flavonid, a on je prisutan u listovima čaja. Dovoljno je da dnevno unesete u svoj organizam dvije do tri šalice crnog čaja da biste smanjili rizik o bolesti, kao što su infarkt, rak,a dobar je i za obnavljanje zubne cakline, za sprječavanje pojavljivanja karijesa. Crni čaj sadrži antioksidante, pa samim tim ima i dvostruki učinak na naš organizam. Crni čaj se jedino ne preporučuje osobama koje pate od anemije, jer sprječava apsorpciju željeza u krvi. Ukoliko ste negdje čuli da crni čaj sadrži mnogo kofeina, više ne morate da brinete. Naučnici potvrđuju da crni čaj neće poremetiti našu hidro ravnotežu. Crni čaj je također dobra zamjena za kavu. Preporučuje se piti kuhane čajeve, a ne one koji se mogu kupiti u flašicama, jer su oni puni šećera. Crni čaj se proizvodi fermentacijom lišća i ima najveću razinu kofeina i koristi se za temelj drugim čajevima. Crni čaj pomaže plućima pušača, ali i nepušača koji su izloženi dimu cigareta. Crni čaj pored svega navedenog smanjuje i rizik od moždanog udara. Zato vam preporučujemo da pored dovoljne količine vode koju pijete dnevno unesete u svoj organizam i nekoliko šalica čaja.