It's supplementation to eliminate the bad bacteria by feeding the good bacteria and raising the acidity of the gut so the sulfur eating bacteria (those that produce the bad smells of indole and skatole <-- sulfur compunds that make up the smell of feces and flatus)can not thrive.
The supplements aren't expensive, the supplement has both peer reviewed research papers on it and FDA allowed claims that are impressive, including it increases good bacteria and reduces bad bacteria in the gut.
I'm going to give it a try, and if anyone else here does as well, let me know how it works.