That was my concern when I was taking Humaworm. However it did not unnerve me. I realized that a big part of the job of friendly bacteria was to keep me safe from unfriendly bacteria. As long as Humaworm did not discriminate, I realized that I did not need support from the friendlies. Of course, we know that they do more than defend. Now, while I am taking in large servings of Iodine (100mg large for me. I only weigh 140), I am not going to worry. When I step back to maintenance mode, I will fix it by consuming probiotics or something to welcome the friendlies back home.