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Finally, the Answers You’ve Been Searching For

If you have been living with persistent bloating, abdominal discomfort, gas, or irregular bowel habits, and have been told your tests are normal or that you simply have IBS, small intestinal bacterial overgrowth may be a significant piece of the picture that has never been properly investigated. SIBO is one of the most commonly overlooked contributors to gastrointestinal symptoms, in part because it requires specific testing to identify and a level of clinical familiarity that many providers lack.

At Ahn Point Wellness, Dr. Lynne B. Ahn brings board-certified gastroenterology expertise and an integrative, root-cause perspective to SIBO treatment in Boston. Her approach goes beyond confirming the diagnosis to understanding why the overgrowth developed in the first place, because without addressing the underlying conditions that allowed SIBO to take hold, recurrence is almost inevitable.

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What Is SIBO?

Small intestinal bacterial overgrowth is a condition in which an abnormally large number of bacteria accumulate in the small intestine, where bacterial concentrations are normally kept low by a combination of digestive secretions, gut motility, and immune mechanisms. When these protective mechanisms are disrupted, bacteria from the large intestine can migrate upward and proliferate in the small intestine, where they interfere with normal digestion and nutrient absorption. The bacteria present in SIBO ferment carbohydrates in the small intestine, producing hydrogen, methane, or hydrogen sulfide gas, leading to the bloating, distension, pain, and altered bowel habits that characterize the condition. Over time, SIBO can impair the absorption of key nutrients, including fat-soluble vitamins, B12, and iron, contributing to deficiencies that extend well beyond the gut. SIBO is estimated to be present in a significant proportion of patients diagnosed with IBS, and is frequently missed because it is not investigated as part of standard gastrointestinal workups.

The Benefits of Physician-Led SIBO Treatment

  • Accurate Diagnosis Through Targeted Testing: SIBO requires specific breath testing to confirm, and the interpretation of results requires clinical familiarity with the nuances of hydrogen, methane, and hydrogen sulfide patterns. Dr. Ahn uses advanced testing protocols and applies specialist-level judgment to ensure that SIBO is accurately identified and appropriately classified.
  • Treatment Targeted to Your SIBO Type: The bacterial composition of SIBO varies between patients, and different types—hydrogen-dominant, methane-dominant, and hydrogen sulfide-dominant—respond to different treatment approaches. Dr. Ahn tailors the treatment protocol to the specific type of SIBO identified, improving efficacy and reducing the risk of incomplete eradication.
  • Investigation of Underlying Contributors: SIBO rarely develops without a reason. Motility disorders, low stomach acid, structural abnormalities, immune dysfunction, and prior antibiotic use are among the many factors that can predispose a patient to SIBO. Dr. Ahn investigates these underlying contributors as part of every evaluation and addresses them alongside the overgrowth itself.
  • Reduction of Recurrence Risk: Treating the overgrowth without addressing the conditions that allowed it to develop significantly increases the likelihood of recurrence. Dr. Ahn's approach prioritizes the identification and correction of predisposing factors, giving patients the best possible foundation for lasting resolution rather than repeated treatment cycles.
  • Nutritional Assessment and Repletion: Because SIBO can impair the absorption of key vitamins and minerals over time, Dr. Ahn evaluates micronutrient status as part of the SIBO workup and incorporates targeted nutritional repletion into the treatment plan where deficiencies are identified.
  • Comprehensive Gut Health Restoration: Beyond eradicating the overgrowth, Dr. Ahn develops a plan to restore healthy gut microbiome composition, support the gut barrier, and optimize the digestive conditions that keep bacterial populations in the small intestine appropriately controlled.
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Is Physician-Led SIBO Treatment Right for Me?

At Ahn Point Wellness, SIBO treatment in Wellesley is a strong fit for patients who are experiencing persistent bloating, gas, abdominal pain, diarrhea, constipation, or a combination of these symptoms, particularly those who have been diagnosed with IBS without meaningful improvement from standard treatments. It is also appropriate for patients with known risk factors for SIBO, including a history of gut motility disorders, prior abdominal surgery, low stomach acid, chronic proton pump inhibitor use, or a history of food poisoning or gastrointestinal illness.

Because SIBO shares symptoms with a number of other gastrointestinal conditions, proper testing and clinical evaluation are essential before beginning treatment.

Dr. Ahn conducts a thorough assessment to confirm the diagnosis, classify the type of SIBO present, and identify the predisposing factors that need to be addressed, ensuring that the treatment plan is as targeted and effective as possible.

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The SIBO Treatment Process What to Expect

Comprehensive Initial Consultation

Dr. Ahn conducts a thorough review of your gastrointestinal history, symptoms, dietary habits, prior treatments, medications, and overall health to establish the clinical context needed to guide an accurate and meaningful evaluation.

SIBO Breath Testing

A lactulose or glucose breath test is ordered to measure hydrogen, methane, and hydrogen sulfide gas production in the small intestine. The pattern and timing of gas elevations provide the diagnostic information needed to confirm SIBO and identify the predominant bacterial type.

Comprehensive Gut Evaluation

Depending on your clinical picture, Dr. Ahn may order additional testing, including comprehensive stool analysis, intestinal permeability assessment, and micronutrient evaluation, to build a complete picture of your gut health and identify any concurrent conditions contributing to your symptoms.

Personalized Treatment Protocol

Based on your test results and clinical findings, Dr. Ahn develops a targeted treatment plan that may include pharmaceutical or herbal antimicrobial therapy, dietary modification, prokinetic support to improve gut motility, and gut-supportive supplementation tailored to your specific SIBO type and predisposing factors.

Post-Treatment Testing & Assessment

Following the treatment course, repeat breath testing is used to confirm eradication of the overgrowth and guide decisions about whether additional treatment cycles or maintenance strategies are needed.

Long-Term Gut Health Strategy

Once the overgrowth is resolved, Dr. Ahn develops a longer-term plan to restore healthy microbiome composition, support gut barrier function, and address the underlying conditions that predisposed you to SIBO, reducing the likelihood of recurrence and supporting lasting gut health.

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Your SIBO Treatment Results

Many patients experience meaningful improvement in bloating, abdominal discomfort, and bowel regularity during and following a targeted SIBO treatment in Boston. However, the timeline and degree of improvement vary depending on the type and severity of the overgrowth, the presence of concurrent gut conditions, and how comprehensively predisposing factors are addressed.

For patients whose gastrointestinal symptoms have been significantly driven by SIBO, successful treatment can produce a level of relief that standard IBS management has been unable to achieve. Dr. Ahn monitors progress through follow-up testing and clinical assessment, adjusting the approach as needed and building a long-term strategy that supports sustained gut health rather than simply resolving the immediate episode of overgrowth.

Why Choose Ahn Point Wellness?

SIBO is a condition that requires specialist knowledge, targeted testing, and a clinical approach that extends well beyond eradicating the overgrowth. At Ahn Point Wellness, every aspect of that standard is met.

Board-Certified Gastroenterology Expertise

Dr. Ahn's specialist training in gastroenterology gives her a depth of clinical knowledge about small intestinal function, gut motility, and the conditions that predispose patients to SIBO that distinguishes her approach from general practitioners or integrative providers without specialist credentials.

Targeted Treatment by SIBO Type

Different SIBO types require different treatment approaches, and a protocol that works for hydrogen-dominant SIBO may be insufficient for methane or hydrogen sulfide presentations. Dr. Ahn classifies each patient's SIBO accurately and tailors the treatment protocol accordingly, improving the likelihood of complete and lasting eradication.

A Focus on Root Causes, Not Just Eradication

Eradicating the overgrowth is the first step, not the finish line. Dr. Ahn investigates and addresses the predisposing factors that allowed SIBO to develop, giving patients the best possible foundation for lasting resolution rather than a cycle of recurrent treatment.

Integration With Broader Gut and Systemic Health

SIBO rarely exists in complete isolation. Dr. Ahn evaluates it alongside the full picture of each patient's gut health, nutritional status, hormonal balance, and lifestyle, ensuring that treatment addresses not just the overgrowth, but the broader health context in which it developed.

Patient Testimonials

5 out of 5 stars

Dr. Lynne Ahn is one of the most compassionate, intelligent, and highly qualified physicians I know. Lynne has been an invaluable resource and an excellent guide across various ...

Dr. Lynne Ahn is one of the most compassionate, intelligent, and highly qualified physicians I know. Lynne has been an invaluable resource and an excellent guide across various aspects of medicine as my gastroenterologist and functional medicine physician. Her approach to care is second to none, and I am constantly amazed by her depth of knowledge and commitment to her patients’ well-being.

Carolina Mujica, DMD, CAGS
5 out of 5 stars

Dr. Ahn and her staff are amazing! I haven’t been feeling like myself over the past few years, and wasn’t getting answers from other doctor visits. I knew it was time to invest ...

Dr. Ahn and her staff are amazing! I haven’t been feeling like myself over the past few years, and wasn’t getting answers from other doctor visits. I knew it was time to invest in my health, so I did my research and found Ahn Point Wellness. Dr. Ahn’s approach to wellness is exactly what I wanted. She does a thorough and comprehensive series of tests in order to get a complete overview of your health. At the follow-up appointment, she spends time explaining the test results and walks you through options and recommendations that address your personal needs. It’s been a month since my follow-up, and I’m starting to feel like my old self again. I highly recommend Ahn Point Wellness!

Anonymous Patient
5 out of 5 stars

My evaluation appointment with Dr. Ahn was such a relief and a pleasant surprise compared to previous experiences with doctors. Most importantly, I felt listened to as a patient...

My evaluation appointment with Dr. Ahn was such a relief and a pleasant surprise compared to previous experiences with doctors. Most importantly, I felt listened to as a patient. I felt like she was really taking the time to do an extremely thorough and thoughtful exam, and I really appreciated her patience with questions and concerns.

Christy C.
5 out of 5 stars

Dr. Ahn is an unmatched, excellent gastroenterologist; she has a vast clinical experience and depth of knowledge, which fortifies her clinical ability. I am a retired physician ...

Dr. Ahn is an unmatched, excellent gastroenterologist; she has a vast clinical experience and depth of knowledge, which fortifies her clinical ability. I am a retired physician and, as such, highly endorse her ability in gastrointestinal disorders, as I found when she treated me. I am pleased to support her superb medical abilities.

Earle B. Weiss, MD
5 out of 5 stars

Thanks very much for discussing the path results and treatment plan with me. And thank you for your expertise in making efficient and unequivocal diagnoses of esophagitis and no...

Thanks very much for discussing the path results and treatment plan with me. And thank you for your expertise in making efficient and unequivocal diagnoses of esophagitis and non-celiac gluten sensitivity, issues which I can now address. I feel better physically now than at any point since my retirement 3 years ago, thanks to you!

KRK
5 out of 5 stars

I met with Dr. Ahn virtually in October of 2020 to discuss my experience with menopause and how to best protect my body in the future. I had thought about using hormone therapy,...

I met with Dr. Ahn virtually in October of 2020 to discuss my experience with menopause and how to best protect my body in the future. I had thought about using hormone therapy, but wasn’t quite sure it was for me. Dr. Ahn explained the many benefits of HRT not only to alleviate menopausal symptoms, but to preserve my brain, organs, and bones as I continue to age. She did extensive blood work to determine my hormone levels, micronutrients, and an in-depth review of my cholesterol. She then prescribed a combination of HRT and supplements to boost my health and well-being, while also taking into consideration my lifestyle and not wanting to wake up and take 20 pills every day! Dr. Ahn practices a unique approach to women’s health whereby she spends a lot of time understanding her patients, and then digs into the data to formulate a customized wellness routine that optimizes their health. Her vast knowledge of women’s health and her attention to patient needs are unmatched!

Kirsten H.
5 out of 5 stars

Conventional medicine with my PCC was not addressing any of my perimenopausal signs and symptoms, nor my fears for the next chapter of life. Dr. Ahn’s thorough, caring, and prof...

Conventional medicine with my PCC was not addressing any of my perimenopausal signs and symptoms, nor my fears for the next chapter of life. Dr. Ahn’s thorough, caring, and professional knowledge has proven remarkable results for me! Thank you, Dr. Ahn, for making such an impactful change in my life!

Thrilled Patient
5 out of 5 stars

I found Dr. Ahn when I was looking at available options for menopausal relief. First and foremost, she is kind, thoughtful, and willing to spend the time to find the right solut...

I found Dr. Ahn when I was looking at available options for menopausal relief. First and foremost, she is kind, thoughtful, and willing to spend the time to find the right solution for you. A huge bonus is that she is a gastroenterologist, especially when trying to find your best path to wellness. Bottom line: she is my favorite doctor and the one I go to first with any questions.

Anonymous Patient
5 out of 5 stars

I thought fatigue was just something that I would have to deal with, and I accepted it as “what happens when you get older.” I’m 47 and had lost my libido, and that was botherin...

I thought fatigue was just something that I would have to deal with, and I accepted it as “what happens when you get older.” I’m 47 and had lost my libido, and that was bothering me because I have a very loving husband. After seeing Dr. Ahn and starting the hormone replacement prescriptions and supplements, my sleep improved tremendously, and so did my energy level. And let’s just say my husband has also noticed other changes, and we are both much happier!

No Longer Tired
5 out of 5 stars

I can honestly say that seeing Dr. Ahn is one of the best things I have done for my health and my happiness.

Anonymous Patient
5 out of 5 stars

I am not exaggerating when I say I couldn’t recommend any doctor more highly.

Happy Patient
5 out of 5 stars

I waited and looked a long time to find a doctor like Dr. Ahn. While I knew I wanted someone to help me navigate the pitfalls of menopause, I was thrilled to find a female physi...

I waited and looked a long time to find a doctor like Dr. Ahn. While I knew I wanted someone to help me navigate the pitfalls of menopause, I was thrilled to find a female physician who had a passionate interest and firsthand understanding of this particular and taxing time in a woman’s life.

Dr. Ahn is passionate, energetic, and thoughtful about the management of my menopause and all of its related, not-so-fun side effects. She is available regularly and has been very responsive to all my questions. I have also become more informed about how I can help manage the whole aging process.
I am thrilled to have found her and have been completely happy to share her with many friends who currently find themselves at the start of this chapter in their lives. Wish I could have found her earlier.

Lynn D.
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SIBO Treatment Boston & Wellesley, MA Frequently Asked Questions

What causes SIBO?

SIBO develops when the mechanisms that normally keep bacterial populations low in the small intestine are disrupted. Common contributing factors include impaired gut motility, low stomach acid, structural abnormalities of the small intestine, immune dysfunction, prior abdominal surgery, chronic proton pump inhibitor use, and a history of acute gastrointestinal illness or food poisoning. Identifying and addressing these predisposing factors is an essential part of effective SIBO treatment.

How is SIBO diagnosed?

SIBO is diagnosed through breath testing, which measures the gases produced by bacteria in the small intestine as they ferment a test substrate. Elevated hydrogen, methane, or hydrogen sulfide levels at specific time points during the test indicate the presence and type of bacterial overgrowth. Dr. Ahn uses validated testing protocols and applies clinical judgment to ensure accurate interpretation of results.

What are the symptoms of SIBO?

The most common symptoms of SIBO include bloating, abdominal distension, gas, abdominal pain or discomfort, diarrhea, constipation, or alternating bowel habits. Some patients also experience nausea, fatigue, and symptoms related to nutritional deficiencies that develop as a result of impaired absorption. Because these symptoms overlap significantly with IBS, SIBO is frequently missed in patients who have received an IBS diagnosis without specific breath testing.

How is SIBO treated?

SIBO treatment typically involves a course of antimicrobial therapy, either pharmaceutical antibiotics or herbal antimicrobials, targeted to the specific type of overgrowth identified. This is often combined with dietary modification to reduce the fermentable substrates available to the bacteria, prokinetic support to improve gut motility and reduce the risk of recurrence, and gut-supportive supplementation. Dr. Ahn tailors the protocol to each patient's specific SIBO type, clinical findings, and predisposing factors.

What is the difference between hydrogen, methane, and hydrogen sulfide SIBO?

The type of gas produced by the bacteria present in SIBO influences both the symptom pattern and the treatment approach. Hydrogen-dominant SIBO is most commonly associated with diarrhea-predominant symptoms. Methane-dominant SIBO, sometimes referred to as intestinal methanogen overgrowth, is more commonly associated with constipation. Hydrogen sulfide SIBO is associated with diarrhea, abdominal pain, and a characteristic sulfurous odor. Each type responds to different treatment protocols, making accurate classification an important part of effective treatment.

Why does SIBO recur, and how can recurrence be prevented?

SIBO recurs when the underlying conditions that predispose a patient to the overgrowth are not adequately addressed alongside the eradication of the bacteria. Persistent motility issues, ongoing acid suppression, dietary patterns that favor bacterial fermentation, and unresolved structural factors can all contribute to recurrence. Dr. Ahn prioritizes the identification and correction of these predisposing factors as a core component of every SIBO treatment plan.

Can SIBO cause nutritional deficiencies?

Yes. Bacterial overgrowth in the small intestine can impair the absorption of key nutrients, including fat-soluble vitamins such as vitamins A, D, E, and K, as well as vitamin B12 and iron. Long-standing or severe SIBO may contribute to deficiencies that produce symptoms well beyond the gut. Dr. Ahn evaluates micronutrient status as part of the SIBO workup and incorporates targeted nutritional repletion into the treatment plan where deficiencies are identified.

Does insurance cover SIBO treatment?

Ahn Point Wellness is a cash-pay practice and does not accept insurance. Many patients find that HSA and FSA accounts can help offset the cost of care. The cash-pay model allows Dr. Ahn to order the specialized testing and spend the time that a thorough SIBO evaluation and treatment genuinely requires, without the constraints that insurance-based medicine typically imposes.

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