Treating & Diagnosing SIBO - Parsley Health
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How We Diagnose & Treat SIBO

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SIBO (Small Intestine Bacteria Overgrowth)

SIBO is responsible for a variety of common digestive symptoms that are easy to misdiagnose or become accustomed to as 'normal.' We use advanced diagnostics to understand the presence and severity of SIBO, and work with patients to find a treatment plan that works for them.

Common Symptoms of SIBO

We assess your medical history and current symptoms related to SIBO. Symptoms often include:

  • Abdominal Pain
  • Diarrhea
  • Bloating
  • Weight Loss
  • Nutrient Deficiencies
  • Malabsorption

Learn More

The Parsley Health approach to SIBO

Advanced Biomarker Testing

Our doctors build a complete picture by testing over 1,000 biomarkers.

Strong Doctor-Patient Relationships

We listen to your concerns and goals to build a trusting relationship with ongoing collaboration.

Personalized Plans

From eating and exercise to sleep and supplements, we make a health plan tailored for you.

High-tech testing to identify the root-cause of SIBO

Your doctor will recommend a personalized testing plan to construct a comprehensive picture of your health and inform treatment.

SIBO is typically diagnosed through a breath test to detect for methane gasses in your breath as a result of increased bacteria. Advanced GI stool profiles may also be used to inform treatment and rule out other GI issues like parasites, inflammation, or leaky gut.

How It Works

Our Success

Parsley Health digestive members that reported improvements


Members who Reduced Prescriptions Dependency


Fully resolved symptoms


Complete Care – SIBO

This annual plan is designed to work with your health care team to treat and resolve SIBO. We'll take time to learn your health story, order advanced diagnostic tests, and find a treatment plan that works for you.

$ 134

A Month, Billed Annually

12 months of care
One full year of care and access to membership benefits.
5 doctor visits
The average person spends 15 minutes a year with a doctor. Our first visit is 75 minutes during which our doctors map your health biography, discuss your symptoms, and design a personalized health plan for you. After your initial visit, the first follow up is 60 minutes, all other follow ups are 30 minutes.
5 health coach visits
Our coaches are certified in functional nutrition. They create a game plan for success for you to follow. The initial visit is 45 minutes, all other follow ups are 30 minutes.
Advanced Biomarker Testing
Unlimited Messaging

Unsure if this plan is right for you? Schedule a free consultation with our health care advisors.

What our Members Are Saying

I'd seen every possible doctor and healer and always left frustrated, with yet another pill. Before Parsley Health, no one took the time to listen to me, do deeper testing, or get to the root cause of my symptoms. Now, not only do I have a solution, I feel more vibrant and alive than ever.


New York City

I had been suffering from exhaustion, bloating and weight gain for years. My Regular PCP just told me to get some sleep. Dr. Egler was the first doctor..


Defense Attorney

I first discovered my doctor, Lilli Link MD, when my gut was telling me "I felt like I need a doctor who is also a nutritionist." Twice, Dr. Link has correctly diagnosed and treated me for some serious medical conditions that traditional doctors couldn't diagnose. She recently joined Parsley Health and I am a super fan of Dr. Robin Berzin's medical and business model. Anyone with digestive issues needs to visit Parsley Health. It is the best money I ever spent and a lot more reasonable than other private functional medicine doctors. Cheers to your good health!

Dara H.

I started Parsley Health because I saw how broken healthcare is today—50% of adults have at least one chronic condition, the majority of which are modifiable or reversible with the right care and lifestyle changes.

Robin Berzin, Doctor & CEO

Meet our doctors

Robin Berzin

Doctor & CEO • New York City


Dr. Robin Berzin, MD is the founder and CEO of Parsley Health. A Summa Cum Laude graduate of the University of Pennsylvania, Robin completed medical school at Columbia University’s College of Physicians and Surgeons, and trained in Internal Medicine at Mount Sinai Hospital in New York City. She has also trained in functional medicine with the Institute for Functional medicine, where she is an advisor on digital technology.


Thyroid, hormones, fertility, digestive health, the biology of stress, cancer prevention, and autoimmune disease

Rachael Gonzalez

Doctor • Los Angeles


Dr. Rachael Gonzalez, MD is board certified physician in both Family Medicine and Integrative Medicine.  Rachael graduated with honors from Harvard College and completed her medical school education at the University of California, San Diego.


Thyroid management, menopause management, adrenal issues, digestive disorders, asthma, allergy, autoimmune conditions, migraines, metabolic syndrome, diabetes, preventative cardiology, and nutrigenomics.

Lilli Link

Doctor • New York City


Dr. Lilli Link, MD is a board-certified internist and functional medicine practitioner who graduated from medical school at the University of Chicago and completed her residency at Columbia Presbyterian Medical Center in New York.


Cancer prevention, cardiovascular disease, thyroid and adrenal health, autoimmune disorders, fatigue, digestive health, weight management, metabolic syndrome, diabetes, allergy desensitization, stress hormones, hormonal health & fertility, and nutrition.

Tiffany Lester

Doctor • San Francisco


Dr. Tiffany Lester, MD is a graduate of The University of Cincinnati College of Medicine, where she completed her training in Internal Medicine. She also graduated from Integrative Medicine Fellowship at The University of Arizona, and she has extensive training in functional medicine through The Institute of Functional Medicine.


Thyroid and adrenal health, cardiovascular disease, metabolic health, stress hormones, genetic and epigenetic medicine, hormonal health and fertility, and autoimmune disease.

Zandra Palma

Doctor • Los Angeles


Dr. Alexandra Palma, MD is a physician with a background in Functional Medicine, Internal Medicine, and Anesthesiology. Her interest in Functional Medicine began in college when she studied Human Evolutionary Biology at Harvard University.


Metabolic health, functional pain management, longevity, metabolic syndrome, hormonal health, health optimization for athletes, genetic and epigenetic medicine, weight management, thyroid, autoimmune, allergies

Jaclyn Tolentino

Doctor • Los Angeles


Dr. Jaclyn Tolentino, DO is a Board-Certified Family Physician with a collaborative, holistic approach to practicing medicine. She holds a subspecialty certification in Hormone Optimization, has received extensive training in Functional Medicine through the Institute of Functional Medicine, and additional training in oncology nutrition.


Hormone balancing and optimization, epigenetic & nutrigenomics, clinical cannabinoid medicine, cancer prevention and nutrition, men’s & women’s health

Kerri Masutto

Doctor • San Francisco


Dr. Kerri Masutto, MD is an Internal Medicine primary care physician with an integrative, whole-person approach to medicine who graduated from The College of Medicine at University of Illinois. With training in primary care, plus ongoing education through the Institute for Functional Medicine she creates a unique healing experience for anyone looking to improve their health and their life.


Optimization, bio-hacking, prevention and reversal of cognitive decline, women’s health, mental health, integrative modalities