Listerine “Kilsl 99%” of Mouth Microbes (Good and Bad)

Original review summary

The review says the 99.9% figure comes from controlled laboratory tests targeting disease-causing germs, not evidence that a normal rinse sterilizes the mouth. It notes antiseptic rinses can affect beneficial and harmful bacteria, but says the microbiome generally rebounds with normal use; heavy, long-term use may shift its balance.[S1]