Talk:Green tea extract

Untitled
Wow. This article is rough.

Polyphenol Content
I have some issues with this statement in the article:

"Standardized green tea extract is 90 percent total polyphenols, and 1 capsule equals 5 cups of tea."

First of all, there is nothing golden about 90 percent. Extracts can be standardized to any percentage. One extract I encountered (Life Extension Mega Green Tea Extract) claims to be 98 percent polyphenols. Another (Jarrow Green Tea Extract) is 50%.

Second, this statement is vague because it does not specify the size of the capsule (500 mg?? 725 mg??), nor does it make precise the meaning of "cup" -- does "cup" mean a standard U.S. cup (about 0.236 liter) or the smaller quantity that is typically consumed as a cup?

And of course, the numbers will vary depending on how the tea is made, so it would be more appropriate to specify a range of values.

Just as one data point, the following article states that 500 mg of EGCG is the equivalent of "five or six cups of green tea". But I don't have time to track down the references on which this statement is based. http://www.lef.org/magazine/mag2008/apr2008_New-Research-On-The-Health-Benefits-Of-Green-Tea_01.htm

Tomtab (talk) 00:38, 24 December 2011 (UTC)

The side effects of drinking large quantities of green tea
I would like to add this piece of text to the green tea extract because I believe that we need to know what this is doing to our bodies. I found this research from the University of Maryland Medical Center Research Center. I hope that we agree. "People who drink a large amount of green tea that contains caffeine over long periods of time may experience irritability, insomnia, heart palpitations, and dizziness. Caffeine overdose can cause nausea, vomiting, diarrhea, headaches, and loss of appetite." — Preceding unsigned comment added by Slavedriver79 (talk • contribs) 22:06, 20 February 2014 (UTC)

We know that green tea extracts contains caffeine. Nothing is said in this article about how much though.