no shower- how does this work

... I was Subject 26 in testing a living bacterial skin tonic, developed by AOBiome, a biotech start-up in Cambridge, Mass. The tonic looks, feels and tastes like water, but each spray bottle of AO+ Refreshing Cosmetic Mist contains billions of cultivated Nitrosomonas eutropha, an ammonia-oxidizing bacteria (AOB) that is most commonly found in dirt and untreated water. ...

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... The most extreme case is David Whitlock, the M.I.T.-trained chemical engineer who invented AO+. He has not showered for the past 12 years. ...

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... Meanwhile, I began to regret my decision to use AO+ as a replacement for soap and shampoo. People began asking if I’d “done something new” with my hair, which turned a full shade darker for being coated in oil that my scalp wouldn’t stop producing. ...

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According to Julie Segre, a senior investigator at the National Human Genome Research Institute and a specialist on the skin microbiome, there is a strong correlation between eczema flare-ups and the colonization of Staphylococcus aureus on the skin. Segre told me that scientists don’t know what triggers the bacterial bloom. But if an eczema patient could monitor their microbes in real time, they could lessen flare-ups. “Just like someone who has diabetes is checking their blood-sugar levels, a kid who had eczema would be checking their microbial-diversity levels by swabbing their skin,” Segre said.

AOBiome says its early research seems to hold promise. In-house lab results show that AOB activates enough acidified nitrite to diminish the dangerous methicillin-resistant Staphylococcus aureus (MRSA). A regime of concentrated AO+ caused a hundredfold decrease of Propionibacterium acnes, often blamed for acne breakouts. And the company says that diabetic mice with skin wounds heal more quickly after two weeks of treatment with a formulation of AOB.
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Penn said:

I thought in some situations- $50 - or the cost- might have a practical application.

But you have to apply it to areas of the body- by the time you take your clothes off and go thru the process- why not spend 3 more minutes and get a shower?

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