Ordinary probiotics such as the powdery capsules that is so prevalent aren't the most effective. They don't get retained as well. Liquid ones will stick to the small intestinal walls more easily. I implemented my own hack by eating something that is mucilaginous which sticks to the intestines. Then I take a capsule shortly afterwards. Seems to work well... for me.
This protocol worked for me after I hosed my gut microbiome which caused me to lose 80 lbs in 2 months. Take of it as you will.
Exercise is critically important, when you digestion is in turmoil as peristalsis likely gets impacted, at least it did for me. Peristalsis is the undulation of the esophagus, stomach, and intestines which pushes food forward. Exercise restarts this if it isn't functioning correctly.
It's important for keeping the healthy bacteria in the large intestines out of the small intestines. You don't want to cross the streams in this case as it can be very painful and even debilitating.
That's my recipe for a holistic reset and restoration of floral balance.