Tuesday, July 27, 2010
Tea May Help Reduce Blood Sugar in Diabetics and Hot vs. Cold Brewing
As you know I love my tea. I drink it all day long; in fact I am drinking an iced green and white tea now. It is good for so many things I can’t imagine why I wouldn’t drink it whenever possible.
This latest in vitro (in the lab) study published in Food Chemistry suggests that the EGCG in tea (more is found in white and green) may reduce antiglycative action (reduce blood sugar) and have lipoprotein binding (prevent the oxidation of cholesterol) activity. Obviously these results need to be replicated in vivo but the preliminary study is interesting. Since green and white tea is so good for so many things I say why not drink it whenever you can, we do.
I had mentioned before about an article that looked at the antioxidant level of hot versus cold brewed tea. Since reading the article in Food Chemistry I have been cold brewing our tea. The study looked at whether the antioxidant activity, total phenolic content and metal-chelating activity of different teas could be affected by steeping leaves in hot or cold water. The results:
• Total Phenol Content was typically a little higher in hot tea than cold tea. However white tea, whether prepared cold was higher than the other teas and even when hot was higher than all the teas except the Lyon brand (an African and Indian black tea blend).
• Metal Chelating Activity was higher in hot tea. White tea showed the highest chelating power. Chelating activity of the tea infusions measures how effective the compounds in them can compete with ferrozine for ferrous ion.
• Antioxidant Activity in general was a little higher in hot tea than cold. The white tea was highest and higher yet when cold brewed.
• The effects of the different tea infusions in suppressing the oxidation of LDL, i.e. a test of antioxidant functionality, were also evaluated. Cold tea performed best overall in this assay with cold white tea doubling the lag time compared to hot white tea.
What does all that mean? Hot and cold teas performed similarly but there were some differences. The thing that stood out to me is that cold white tea scored extremely well on all measures. Also the charts showed that green tea also fared well. I also want to find some of this Lyons tea which did very well in the testing.
My take away message from this article is add more cold brewed white tea to our intake which is what we have done. You can find white tea at Asian markets, Whole Foods, or Wegman’s. We combine green and white tea together in our brew.
It is amazing how busy I can be yet seem to get little accomplished. Does that happen to any of you? I have exercised, watered and weeded the garden and walked to the grocery store but that is it.
The weather is much milder today so it was a very pleasant walk to the store. We used the end of the carrots and celery in juice this morning so I needed replenish our stock. One of the things I love about where we live is the ability to walk to the grocery store. It is so nice and reminds me of my time in Firenze where everyone grocery shops every day. It is so nice to have that option and not need to get into my car. ;-)
I wanted to mention my favorite snack before I forget. I have told some of you by email but never think to mention it on the blog. If you have a sweet tooth, like I do, take a medjool date and cut it in half and remove the pit. Place a little reduced fat peanut butter in the cavity where the pit was. The richness of the nut butter is a great contrast with the sweetness of the date. It makes a really good snack.
I am going to start the next flax cracker experiment before I get distracted by something else. Then I am going to read my new women’s weight lifting book. Talk to you all again soon. ;-)