A female patient had an unusually stubborn herpetic cold sore in the mouth for four months. She also suffered from cancer, thus there may have been some significant immune exhaustion involved. After one week with the olive leaf, the sore disappeared.
These and other similar clinical successes are consistent with a private 1993 herpes study in humans. In that investigation, a weaker and ethanol (alcohol-based) form of olive leaf extract was used by six individuals with herpes.
All reported symptomatic relief.
Three said their lesions disappeared within 48 hours. The remaining three, who experienced no improvement, then received a stronger dose. One said that three days later, most of the lesions were gone. The other two also reported doing better.
All six subjects said the olive leaf extract produced better results than Acyclovir, a medication they had previously used.