Hello Sylvia, thanks for your question. Chronic yeast infections may be hard to get rid of due to the nature of yeast growth. Some yeast is found naturally in your GI tract but it is only when it overtakes space friendly bacteria needs that it can interfere with GI function. A good article to read is the Pre-Program Detox found under the TyH Program tab on the home page of our website. You'll also find suggestions on how to "clean up" your GI tract and how to take supplements that support that process.
As far as which Olive Leaf Extract to take, it will depend on your tolerance level. The 6% oleuropein strength (Olive Leaf Extract) will be easier to tolerate as the die off of yeast can make you feel flu-like. The 18% strength (Olive Leaf ESE). means you can take fewer doses; however, since it is stronger, you may have more die-0ff symptoms. The Pre-Program will explain how to counteract those symptoms. Always make sure to take a probiotic as you need to replenish the good bacteria to restore GI function. I hope this answers your question!