Sounds to good to be true but olives and olive leaf are truly “super-foods”. A common food that is often ignored, because it is not exotic enough to grab headlines. Olive leaf, (olives & oil) has been used for centuries as medicine. Supported by extensive and excellent science: here is link to a review of the science. Nonsterol Triterpenoids as Major Constituents of Olea europaea.
If you are not interested in the complex science go to this website instead.
I use “Olive leaf extract” powders or capsules, because of the high concentration of active ingredients compared to olives or olive oil. It can be used in chronic diseases where anti-microbials are recommended, such as; Lymes and other tick diseases, recurrent ear, bladder, gastrointestinal or skin infections. Olive leaf works well when paired with antibiotics or antifungals, as the second stage of treatment. The dose, duration and brand matter for the olive leaf to work well. It is best to seek out the advice of a Veterinarian trained in herbal medicine. Successful treatment of stubborn infections takes close supervision because each case is so different.
Sorry, there is no “one size fit all” when it comes to chronic infections.