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I think Mr Kwan has shared some very interesting and useful information here with a strong personal relevance. I, too, am concerned with the topic.
Seems that the substances in tea have proven to be useful, but there is no information in the article in terms of dosage. Does one need to take certain extracts, or daily tea drinking will provide the benefits? -
It is shocking to know 20% of our GDP is lost that way. I am hoping that I won’t be that one in ten when I am 65. Surely hope that drinking tea alone would help.
There is this paragraph about better quality green and oolong tea have more theanine, which is one of the three that are against the disease. So I suppose that means these would be the kind of tea for the prevention? -
In most of the reports that I have read, the scientists have used the substances, such as EGCG, caffeine etc in pure extract forms to mix in water to feed the test mice or rats, such that they can prove it is that substance that is working. The dosages are small, a couple of mg for each kg of the body weight, which is one way how doctors or scientists prescribe dosage for patients.
No one can say for sure what works in the small mammals in experimental settings can work for human as yet. However, to give you an idea, for an average person who weighs say, 75 kg (ie 165 lb) to correspond with what an experiment that used, say, 3 mg/kg, the dosage for a day is 225 mg.If that substance is EGCG, most acceptable quality green, white, or oolong whole leaf tea can easily deliver that in one or two cups, depending on the size, strength and quality of your infusion. There is no findings that over dosage of EGCG is toxic, so the more the merrier.If the substance in consideration is caffeine, restrain your intake to 300 mg a day on the safe side. Overdosage has proven to be not contributive to neuron protection. Read more about caffeine calculation in related Tea Guardian chapters, eg:If the substance you are interested in is theanine, a couple of hundred mg will require higher quality tealeaves and drinking 4 to 5 150 ml cups at medium strength a day, according to the strength of the Korean experiment and the content findings in the Taiwan study, both of which are referenced in the TG article.I have to stress here again that tea is a total package that comes with a lot of substances, the three that mentioned are only what scientists have taken popular notice of, their synergic effect, and that with all the other substances in tea, and that in various proportions in different varieties of tea, has never been seriously studied. It is also interesting to note that some reports I have read but not referenced in the article, which are cohort studies and observations of cohort studies, reflects a stunning alignment with all other studies about the health effect of tea:The positive effects are not as consistent or proven in populations in the West, but dramatically positive in populations in the East, esp in Japan, Taiwan, China and Singapore. I think besides genetics and life and diet styles, one strong reason is the prevalent poor quality of tea being drunk in the West. I hope I am not offending anyone here, but that is a description of the market condition that people like yourself, who are aware of the dramatic difference, should be saving yourselves from, if not also helping the others around you. -
Quote:The positive effects are not as consistent or proven in populations in the West, but dramatically positive in populations in the East, esp in Japan, Taiwan, China and Singapore. I think besides genetics and life and diet styles, one strong reason is the prevalent poor quality of tea being drunk in the West. I hope I am not offending anyone here, but that is a description of the market condition that people like yourself, who are aware of the dramatic difference, should be saving yourselves from, if not also helping the others around you.
Indeed, and no offense taken. I’m often rather botheredthat I have to search for anything “half” decent – which here is broken leaves. Most of it is exposure. I don’t think my countrymen are that dumb, but when you grow up equating tea with tea dust, it takes a bit to adjust to the full leaf thing. Having been raised not only on sweetened tea-dust water, but sweatened store-brand tea-dust water, it never occurred to me until recently that leaves are supposed to be full – “broken” leaves where, I thought, the better quality stuff, and tea dust the norm.
Even my local dim-sum style place (sorta; can’t claim it’s anything like a real dim sum place but it’s between the usual takeout place and the Japanese grills we have here) serves and sells broken tea (though I think their pu-erh might be full).
As for alzheimer’s, I don’t believe anyone in my family has suffered it (we got our curse in the form of myotonic muscular dystrophy) but sometimes I feel it hovering over my shoulder like a grim spectre of the future to come. Or I could just be paranoid.
M.
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When Alzheimer’s is the concern, it is in tea the good catechins, theanines, and caffeine, that you want. In better quality greens, whites and oolongs you have a lot of these things and not so much the AL. AL is present in many things you eat and trace amount is good to health. For overdose concern, AL from other things in modern life: cookware, water, commercially produced baked goods, etc are a lot more serious.
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