AO Biome Mother Dirt – Ammonia Oxidizing Bacteria


AO Biome Mother Dirt Review

Mother Dirt is a new lineup of biome-friendly body care products that promise to restore your skin’s natural balance of good bacteria. Here’s our review of AO Biome Mother Dirt products.

What is Mother Dirt?

Mother Dirt is a lineup of body care products that promise to reduce your dependence on conventional products like soaps, deodorants, and moisturizers.

The product lineup uses biome-friendly ingredients that “rebalance the skin” and reduce your use of toxic chemicals and harsh ingredients.

There are currently three products in the Mother Dirt lineup, including:

— Mother Dirt AO+ Mist
— Mother Dirt Cleanser
— Mother Dirt Shampoo

The company’s slogan across all its products is “Rethink Clean”.

What is AO Biome?

AO Biome is an American cosmetic manufacturer that “is dedicated to advancing the science of AOB on human health”, according to the company’s homepage:

What is AOB, you might ask? AOB stands for Ammonia Oxidizing Bacteria. When you use modern cleaning and body care products, it throws your human microbiome out of whack. Every time you clean your body with chemical-based soaps and deodorants, you’re reducing levels of potentially important AOBs.

To combat this trend, AO Biome has created a lineup of body care products that aim to restore your skin’s microbiome “and potentially impact a wide variety of human health conditions”. AO Biome claims their products could potentially reduce inflammation and reduce your risk of infection, for example.

The company is actively developing a number of therapeutic products that it is bringing to market, including topical creams for acne, rosacea, and eczema. AO Biome’s homepage features a therapeutic pipeline detailing the progress of all of these treatments.

The official name of the company is AOBiome, LLC. That company is based at the following address in Boston:

AOBiome, LLC.
One Broadway, 14th Floor
Cambridge, MA 02142

You can reach the company by phone at 1-617-401-3191 or by email at [email protected]. There’s also an online contact form at the company’s official website:

AO Biome Mother Dirt Products

The company’s three products include a body care mist, a facial cleanser, and a shampoo. Only one of the products, AO+ Mist, contains AO Biome’s patented formula that contains live Ammonia Oxidizing Bacteria (AOB).

The remaining products don’t contain that formula. Instead, they’re designed to be replacement cleansers and shampoos (because using normal cleansers and shampoos would kill the AOB and destroy the progress you made by using AO+ Mist).

Ammonia Oxidizing Bacteria work by consuming irritants in our sweat and then converting those irritants into beneficial ingredients for the skin.

Here’s what you need to know about each product:

AO+ Mist

— $49 for a 3.4 fluid ounce bottle containing 550 sprays, or about 20 sprays per day (one month supply)

AO+ Mist is the cornerstone of the Mother Dirt line. The company claims you can spray the mist all across your body to reduce your overall dependence on traditional soaps, moisturizers, shampoos, and deodorants. Basically, it can be used all across your body to reduce the number of irritants on and around your skin.

Ingredients in AO+ Mist include: Water, live cultured ammonia-oxidizing bacteria (AOB), disodium phosphate, and magnesium chloride.


— $15 for a 3.4 fluid ounce bottle

This face and body cleanser claims to be “the first and only cleanser formulated and tested to maintain the good bacteria of the skin”. The cleanser uses a formula derived from plants.

Unlike the other two products listed here, the cleanser does not contain live AOB. Instead, it supports the existing good bacteria on your skin, which thereby helps the AOB in AO+ Mist become more effective.

Ingredients include all of the following: Water, Cocamidopropyl Betaine (mild surfactant), Rosa Damascena Flower Water, Decyl Glucoside (mild surfactant), Plyrus Malus (Apple) Fruit Extract, Glycerin (moisture-binding), Hydrolyzed Quinoa (moisture-binding), Hydroxypropylcellulose (thickener), and Citric Acid (pH stabilizer)


— $15 for a 3.4 fluid ounce bottle

This shampoo, like the cleanser, does not contain AOB but works to complement the AOB in the AO+ Mist.

The shampoo is safe to use on color treated hair. When applied to your hair after applying AO+ Mist, it won’t harm the live bacteria.

It’s also a plant-based shampoo that uses ingredients like rose flower water and apple fruit extract.

Ingredients include: Water, Cocamidopropyl Betaine (mild surfactant), Rosa Damascena Flower Water, Decyl Glucoside (mild surfactant), Plyrus Malus (Apple) Fruit Extract, Glycerin (moisture-binding), Hydrolyzed Adansonia Digitata (Baobab) Seed Protein (softener), and Hydroxypropylcellulose (thickener)

How Do Ammonia Oxidizing Bacteria Work?

AOB, or Ammonia Oxidizing Bacteria, are the cornerstone of Mother Dirt’s product lineup.

AO Biome has an extensive science section on the Mother Dirt website where they explain how this AOB works.

Basically, the problem with our current skin’s health is that our modern cleaning products kill 99.9% of bacteria. In reality, there’s a difference between being hygienic and being sterile:

“Now, this is not a reason to stop washing your hands! But instead, this is about thinking about “clean”. What if restoring and maintaining beneficial bacteria is key to healthy skin? What if we change the way we treat our skin, and in doing so embrace it as the living ecosystem it is? This is what our research and mission are dedicated to.”

AOB work by targeting the irritant components in our sweat: the ammonia and urea. Then, the AOB convert those irritating components into byproducts that bring benefits to our skin: Nitrite and Nitric Oxide.

Nitrite benefits your skin by reducing levels of bad bacteria while Nitric Oxide works as an antioxidant to “calm and soothe the skin”.

Together, these two chemicals restore your skin’s natural balance and reduce your dependence on soaps, moisturizers, and deodorants.

Even if you feel like you don’t sweat a lot, AO Biome claims that you sweat all the time. By taking advantage of this sweat, you can enjoy powerful benefits across your skin and body.

The problem with AOB is that they’re very sensitive to modern cleaning products:

“AOB have elaborate membranes that make them very sensitive to chemicals found in modern soaps, detergents, and preservatives. A single use of a conventional soap will very likely wipe them right out.”

That’s why AO Biome recommends applying these chemicals after showing, after using conventional products, and after swimming in pools.

You can read more about the science behind AOM by visiting Mother Dirt’s official science section here:

How to Buy Mother Dirt Products

Mother Dirt products are currently only available from the online store, where you’ll find the three products available at the prices listed below:

— AO+ Mist: $49
— Cleanser: $15
— Shampoo: $15
— Mother Dirt Bundle (includes all three products): $69

All three products are designed to be one month supplies. In fact, the cleanser and shampoo will actually expire after a month. Fortunately, they’re small enough to take on an airplane – so you shouldn’t have trouble using up all of the product within a month.

Other products available for sale on the Mother Dirt online store include a Mother Dirt t-shirt for $15.

You can also order a Mother Dirt subscription for all of the above products, where you pay the same amount per month and receive an automatic delivery of each Mother Dirt product in your mailbox every month. It’s an autoship program, although it doesn’t appear to reward you with any type of discount.

Free shipping is available on orders over $75. Anything below that and you’ll need to pay an $8.99 flat rate for shipping anywhere in America.

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  1. There seems to be a lot of controversy about the Mother Dirt products. I was new to Mother Dirt prior to Christmas 2016, but I ordered the shampoo and the AOB Mist. I’ve had great success thus far; it cleared my seborrheic dermatitis in my ears and on my scalp. Additionally, my skin on my hands and my legs is clear, my feet don’t sweat and neither do my armpit. I love this product I just wish it was a less expensive.

  2. I used it for two months when it first came out and stopped using soap/shampoo/body products as they recommend, except for coconut oil as needed for a moisturizer. I was pretty amazed (especially because I always had a big problem with armpit sweating to the point where I had prescription deodorant at one time) It truly worked. I do use a deoderant now (Primal pit paste) but still no soaps or other products, and my skin is healthier, softer (my hands and feet used to crack because they were so dry) and it stuck pretty well since I didn’t continue to use the spray. I just bought some more because I am getting ready to battle my last area of dry skin, my shins, with it, and I also want to try to get to the point where I don’t even need the primal pit paste anymore. If you follow their recs for how to use the product, you will definitely see results! I know not everyone is willing to forego products, but I truly just don’t need them anymore. And btw I’m not affiliated with teh company at all, I read about it on Chris Kresser’s blog when it first came out and tried it.

  3. I posted a review but Mother Dirt chose not to use. I bought the bundle (mist, shampoo, cleanser). I regret getting the bundle. Their shampoo and mist seemed to strip my skin too much. Might be gentle for bacteria, but not skin necessarily. After the shower/cleanse with their products I continued to mist twice per day. By day 5 my hair still felt like straw, skin was okay. They recommend 5 – 7 sprays twice daily, but if you spay head, face, armpits, groin, palms, and soles of feet, that’s more like 9 sprays, so you might go thru the mist faster than one month. Just saying. I don’t sweat a lot, unless it’s summer and high humidity, and the little bacteria seem to need your sweat (and the ammonia in it), so they didn’t do real well on my body. I’d buy the mist again, but probably in the summer. I went back to using my more moisturizing shampoo and soap with their mist. Price is kind of expensive for what you get.

    • Just be aware that with these products, you aren’t supposed to be washing your hair every day, and you are still supposed to use a conditioner if its too stripping for your hair. I wash and condition my hair once or twice a week (depending on what happens) and thats all. If I used it more often, my hair would be like straw as well. The point is to wash your hair less frequently instead of every day/every other day like with normal shampoos.

  4. I tried it and was amazed by how effective it was. I still shower, but I do not need deodorant and after a 30 mile bike or 10 mile run I have absolutely no smell. My clothes are stinky but my body is not. Not only that, I do not need moisturizers and I no longer get pimples on my face or chest. Well worth every penny and I have even converted the rest of my family

  5. This isn’t exactly a review. There’s no analysis or even comments from someone who tried the product. Just reads like an advertisement.

Comments are closed.


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