Does green tea extract do this to you? Sometimes when I drink matcha on an empty stomach I get a weird feeling. Kinda between pain and my stomach turning into something heavy. However Green tea extract doesn't do this to me so I don't know what it is. Also steeped tea doesn't do this, only matcha. Could it be liver pain?
Here are some studies, but I don't think its related:
Biofactors. 2010 Jan;36(1):43-51.
The modifying effects of green tea polyphenols on acute colitis and inflammation-associated colon carcinogenesis in male ICR mice.
Kim M, Murakami A, Miyamoto S, Tanaka T, Ohigashi H.
Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan.
Int J Antimicrob Agents. 2009 May;33(5):473-8. Epub 2009 Jan 20.
Green tea inhibits Helicobacter growth in vivo and in vitro.
Stoicov C, Saffari R, Houghton J.
Department of Medicine, University of Massachusetts Medical School, 364 Plantation Street, Worcester, MA 01605, USA.
Rheumatology (Oxford). 2010 Mar;49(3):467-79. Epub 2009 Dec 23.
Green tea extract inhibits chemokine production, but up-regulates chemokine receptor expression, in rheumatoid arthritis synovial fibroblasts and rat adjuvant-induced arthritis.
Marotte H, Ruth JH, Campbell PL, Koch AE, Ahmed S.
Department of Internal Medicine, University of Michigan Medical School, Department of Veterans Affairs, Ann Arbor, MI, USA.
I seem to remember reading something about the gastrointestinal system and chemokines that causes upset, but I can't find it right now.
Edited by Sillewater, 27 April 2010 - 02:22 AM.