Take the guesswork out of your oral health

Get insight into the root cause of bad breath, tooth decay, gum inflammation, and other conditions with an at-home oral microbiome test. Receive personalized product, hygiene, and diet recommendations to start improving your health.

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How it works

Order your test

We’ll send you a kit, collect a saliva sample at home, and mail it back to our lab.

View results

Get your oral health report card with a breakdown of the bacteria and fungi in your mouth.

Start improving

Receive personalized diet, lifestyle, hygiene, and oral care product recommendations.

Meet your coach

Our oral health experts will talk you through your results and care plan.

Monitor over time

Track how changes you make improve your health through recurrent testing.

“The relationship between your mouth and your health has been overlooked for so long. Connecting the mouth to the rest of the body for true holistic well-being is finally an option.”

Shivan Sarna

Holistic & Gut Health Expert

Good health starts with a healthy mouth.

The Bristle test can help identify the root cause of symptoms, including:

Chronic bad breath
Gut inflammation
Tongue coating
Burning mouth
Inflamed gums
Weird taste
Tooth decay

Your oral health is driven by your oral microbiome

The mouth is home to the second largest microbiome in your body with trillions of microbes, some beneficial and others harmful.

Each individual has between 100 - 200 bacterial species in their mouth on average, and factors like nutrition & hygiene determine which species you have.

Most oral diseases and conditions are caused by an overabundance of harmful microbes.

Your oral microbiome impacts your overall health

Oral bacteria are associated with a range of systemic and chronic conditions including:

Cognitive decline

Adverse pregnancy outcomes

Respiratory conditions

Cardiovascular diseases


Gastrointestinal inflammation

Optimizing your oral health is critical to gut, brain, heart, and whole-body health & wellness.

Test your oral microbiome

Measure the 100+ beneficial and harmful oral bacteria and fungi in your mouth.

Get your oral health report card

With scores for tooth decay, gum inflammation, halitosis (bad breath), gut inflammation, and beneficial bacteria.

Get 1:1 coaching with an oral health specialist

Speak with your Bristle coach to review your results and receive a personalized care plan.

Optimize your routine

Start following your individualized diet, hygiene, and oral care plan.

Track your progress

With subscription testing, quantifiably monitor how changes you make impact your oral health scores and microbiome.


Dr. Roshan Parikh, DDS

President at dntl bar

Former Head of Dentistry, Walmart, Chief Strategy Officer, DSO Strategy, LLC

Dr. Bonnie Feldman, DDS

General Dentist and Founder of Autoimmune Connect

International speaker, consultant, and writer with a focus on the oral microbiome's connection to systemic disease

Dr. Jonathan Levine, DDS

Founder of GLO Science, Oral Health Expert, Social Entrepreneur

Former Associate Professor at NYU School of Dentistry and co-founder of the GLO GOOD Foundation

Dr. Mark Burhenne, DDS

Family Dentist and Founder of AskTheDentist.com

Former Chief Dental Officer at Quip and best selling author

Dr. Eric Pulver, DDS

Oral & Maxillofacial Surgeon and Chief Dental Officer at Denti.Ai

Former Director of Oral & Maxillofacial Surgery at the University of Chicago Hospitals and team surgeon for the Chicago Blackhawks