Researchers at the University of Tohoku (Japan) discovered another good property of Green Tea – the neuro-protective one. It is proved by a study, done on more than thousand citizens over the age of 70 years. The results, published in the American Journal of Clinical Nutrition, showed that people who consume two or more cups of Green Tea a day, compared to those who only drink three cups a week, have half less probability that mental health problems associated with aging occur.
The Green Tea seems to be able to reduce significantly the incidence of neurodegenerative diseases such as Alzheimer’s and Parkinson’s. Because of its polyphenols it is very essential in the fight against the free radicals, which are responsible for cellular aging and degenerative processes.
Also at the University of Newcastle upon Tyne (UK) the scientists have shown that drinking tea regularly may improve memory. They discovered that green or black tea inhibits the activity of certain enzymes in the brain associated with memory. The two types of tea block the activity of the AChE (enzyme acetylcholinesterase), which damages the neurotransmitter acetylcholine. Alzheimer’s disease is characterized by a fall in the levels of acetylcholine. The researchers also found that both types of tea reduce the activity of BuChE (butyrylcholinesterase enzyme), whose presence has been found in the brains of Alzheimer’s patients.
Green Tea is even more special- it is capable of blocking the activity of beta-secretase (which plays a role in the production of protein deposits in the brain). Furthermore, the duration of the inhibitory effect is higher than the one by the black tea, as the benefits of Green Tea last a week and those of black tea only one day.
In everyday life, the Green Tea helps in case of tiredness, it increases the concentration and enhances the ability of muscles to withstand the efforts. In 10 minutes, after drinking 2-4 cups of Green Tea, the concentration begins to strengthen and reaches its peak 45 minutes after ingestion.