I have read that Olive leaf Ext works againts Helibacter pylori infection. I have no experiance just read it in the book called Olive leaf ext. And have seen it on line.
It said,
"Olive leaf extract demonstrates antimicrobial activity against Campylobacter jejuni, Helicobacter pylori and Staphylococcus aureus [including meticillin-resistant S. aureus (MRSA)]. "