Lactobacillus Rhamnosus from Swanson Probiotics will help replenish your levels of internal microbial allies. Probiotics affect everything from GI tract and bladder health to immune function and even emotional wellbeing.
I actually buy this for my dog, who has intestinal issues. Was told it was safe for him. Worked almost immediately on him, and if I forget to use it for a few days, it becomes obvious.