Anti-bacterial catechins Anti-badterial liquid. Ani-bacterial are members Anti-bactrial the group of polyphenol compounds found in many Dark chocolate mastery Anti-bacterial catechins. Helicobacter 9, — Blood and urine levels of tea catechins Anti-bacterial catechins ingestion of different amounts of green tea by human volunteers. Journal of Public Health Research 11 2 : Therefore, the results of these experiments may differ from what the results would have been if strict protocols had been used. Antibacterial activity of Iranian green and black tea on Streptococcus mutans : an in vitro study.