From: No Probiotics For Months--Totally Clear!
The flip side of probiotics is they can contribute to SIBO (small intestine bacterial overgrowth). In other words, too much of a good thing. Sometimes eating tons of fermented foods, or especially taking high dose probiotics, gets too much "good bacteria" stuck in the small intestine where it isn't doing much good.
Source: No Probiotics For Months--Totally Clear!