Skip to comments.Tea could improve memory, study shows
Posted on 10/26/2004 7:12:22 AM PDT by AdmSmith
Drinking regular cups of tea could help improve your memory, new research suggests.
Results of laboratory tests by a team from the University of Newcastle upon Tyne found that green and black tea inhibit the activity of certain enzymes in the brain which are associated with memory.
The findings, which are published in the academic journal, Phytotherapy Research, may lead to the development of a new treatment for a form of dementia which affects an estimated ten million people worldwide, Alzheimer's Disease.
For their experiment, the research team, from Newcastle University's Medicinal Plant Research Centre, investigated the properties of coffee and green and black tea in a series of scientific experiments. Black tea – traditional English breakfast tea – is derived from the same plant as green tea, Camellia sinensis, but has a different taste and appearance because it is fermented.
They found that both green and black tea inhibited the activity of enzymes associated with the development of Alzheimer's Disease, but coffee had no significant effect.
Both teas inhibited the activity of the enzyme acetylcholinesterase (AChE), which breaks down the chemical messenger or neurotransmitter, acetylcholine. Alzheimer's is characterised by a drop in acetylcholine.
Green tea and black tea also hinder the activity of the enzyme butyrylcholinesterase (BuChE), which has been discovered in protein deposits which are found on the brain of patients with Alzheimer's.
Green tea went one step further in that it obstructed the activity of beta-secretase, which plays a role in the production of protein deposits in the brain which are associated with Alzheimer's disease. Scientists also found that it continued to have its inhibitive effect for a week, whereas black tea's enzyme-inhibiting properties lasted for only one day.
There is no cure for Alzheimer's but it is possible to slow the development of the disease. Drugs currently on the market hinder the activity of AChE, and others are being developed which scientists hope will inhibit the activity of BuChE and beta-secretase.
However, many of the drugs currently available, such as donepezil, have unpleasant side effects and the medical profession is keen to find alternatives.
The Newcastle University researchers are now seeking funding to carry out further tests on green tea, which they hope will include clinical trials. Their aim is to work towards the development of a medicinal tea which is specifically aimed at Alzheimer's sufferers.
The next step is to find out exactly which components of green tea inhibit the activity of the enzymes AChE, BuChE and beta-secretase.
Lead researcher, Dr Ed Okello, who is also a lecturer with Newcastle University's School of Biology, said: "Although there is no cure for Alzheimer's, tea could potentially be another weapon in the armoury which is used to treat this disease and slow down its development. It would be wonderful if our work could help improve the quality of life for millions of sufferers and their carers.
"Our findings are particularly exciting as tea is already a very popular drink, it is inexpensive, and there do not seem to be any adverse side effects when it is consumed. Still, we expect it will be several years until we are able to produce anything marketable.
Dr Okello, himself a green tea drinker, said the findings of the research suggested tea could boost the memory of everyday drinkers: "The ageing politician, Tony Benn, is a prime example of somebody who drinks tea and has a fantastic memory. He is said to drink 18 pints a day and has a very sharp mind for a man of his age," he added.
Prof Clive Ballard, director of research, Alzheimer's Society, said: "This interesting research builds on previous evidence that suggests that green tea may be beneficial due to anti-oxidant properties. Certainly the effect on the cholinesterase enzyme (the target of current anti-dementia drugs such as Aricept) and beta-secretase (an enzyme which is important in the build up of plaques) is very exciting and requires further investigation."
I was gonna post this myself, but I forgot.
Bring on the tea.
I'm partial to Lapsang Souchong. My friends have been telling me that green tea is better for you, and this seems to indicate that they may be right.
Now if only I could remember what I did with that teacup......
If I could only remember to drink some tea, I'd never forget to drink my tea.
Mate is the favored tea in S America.
Thank you for your post. Humor gets my day off to a start, and I may never recover from your tag-line!!
I always wondered the the reason for my incredible brilliance! :-P
Think I'll have more tea!
Any particular brand you're partial to?
bookmark for later printing. The wife and I love tea.
Long island iced tea makes me forget.
But how much tea? I hear it can also cause kidney stones, don't know it this is true.
Chai and Earl Grey!
Sad, I can't drink tea because it gives me a head-AChE and it gives me nausea so bad I want to PuChE...;-)
Tea is for little girls and the british (but I repeat myself.)
Thanx. I'll check some of the local Asian markets.
hehe...maybe you ought make those LI teas w/ some green tea?
18 pints? I guess all those bathroom breaks give him time to think. (And a 79-yr old prostate probably doesn't help much either.) LOL
BTW How much tea are they talking about?
Sounds cool, but there are lots of missing data from your
1) What type of tissue did they study? Was it rat brain?
Bird-brain?, cat brain? Can this be correlated with human brain?
2) Is there a strong association with activity of those
enzymes in human dementia?
3) Are there other co-factors involved with development of
4) Will the "active" ingredients once identified, be toxic
on their own right? (i.e. could they inhibit AChesterase
in let's say the vagus nerve?)
5) Are there aged people who are alert, bright, cogent
6) Are there animal models of Alz. dementia that we could
test this hypotheses on?
Just a few of the questions which come to mind(without tea!).
(sarcasm mode) -- on
I do know for sure, that if John Kerry is President, those
Alzheimers patients will all be able to think clearly again!
(sarcasm mode) -- off
When reached by this reporter, Mr. Benn was reciting the Odyssey in Greek from memory.
"When did you start this?" we asked.
"An hour and a half ago, when I first entered this bathroom," he said. "Tell my family I'll be out when my kidneys are empty."
Nice tag line. I completely agree the Outer Space treaty is bullpoop (families here--must keep the language decent on any non-south park/team america/john kerry thread).
I wished I liked green tea. I hate the taste of it. I can tolerate black (though I vastly prefer coffee - it figures, no benefits there) but green tastes icky to me.
They have not published the paper yet in Phytotherapy Research. You may check this link later this week for the October issue (I guess):
He has a sharp mind and a prostate the size of a basketball.
"Couldn't of made a better decision."
Why is that? What have you noticed, if anything, since giving up coffee?
Al Gore drank lots of iced tea. Didn't seem to help him much.
I've dropped coffee and made alot of dietary changes (cut out processed foods, eat less meat and eat foods with a high antioxidant content) over the last half year. I'm drinking strictly decaff green tea, plus black and white teas which are also high in antioxidants.
My sleeping patterns are vastly improved, my energy level is very high and my mental attitude is radically improved (better balance mood wise).
The change is remarkable actually.
I mean, he's likely to drown in his tee pee.