The Ammonia-Oxidizing Bacteria (AOB) that we use is a bacteria isolated from soil and grown in large bioreactors. The specific type of AOB used in our AO+ Mist is Nitrosomonas eutropha D23. It used to live on human skin, picked up from the soil when people were much closer to nature. Sometime around 100 years ago we began killing it off our skin through the "advances" in modern hygiene.
The ingredients in the AO+ Mist are water, live-cultured AOB, disodium phosphate (a buffer to suspend the bacteria in liquid), and magnesium chloride (salt).