Commonwealth Diagnostics International

Commonwealth Diagnostics International CDI offers products and services that aid the diagnosis of small intestinal bacterial overgrowth (SIBO) and irritable bowel syndrome (IBS).

Founded in 2015 in Salem, Mass., and operating out of its CLIA-certified laboratory and as an FDA-registered, ISO 13485-certified medical device manufacturer, Commonwealth Diagnostics International (CDI) helps providers identify and diagnose common sources of digestive distress and functional gastrointestinal ailments. CDI’s expansive portfolio of non-invasive at-home hydrogen and methane breath tests supports the diagnosis and treatment of Small Intestinal Bacterial Overgrowth (SIBO) and Intestinal Methanogen Overgrowth (IMO), as well as fructose malabsorption, lactose malabsorption, and sucrose malabsorption. Focused on patient-centric principles, CDI breath tests are easy-to-use, quick, and safe for patients and support meaningful GI health outcomes by helping steer each practitioner’s approach to dietary modification, homeopathic remedies, nutritional supplementation, immune support, high-quality probiotics, and additional testing.

11/28/2025

🌟 Functional Friday | Small Tools, Big Impact 🌟
Modern Gastro Podcast – Episode 3
ft. Tamara Duker Freuman, MS, RD, CDN
Hosted by Craig S. Strasnick | Powered by Commonwealth Diagnostics International (CDI)
Everyone loves to talk about “miracle” cures. Tamara keeps it honest: real progress in gut health often comes from simple, practical tools used well.
On this episode, she breaks down how powerful the basics can be when they’re evidence-based and personalized:
💬 “There are some really helpful things clinicians can offer that aren’t prescription drugs… and I have no beef with big pharma. I’ll take whatever help is available.”
Instead of pitting approaches against each other, Tamara makes the case for “yes, and…” medicine:
🧰 Tools That Can Be Truly Life-Changing:
✅ A well-chosen fiber supplement – not random fiber, but the right type and dose for the right condition

✅ Targeted FODMAP enzymes – helping patients tolerate more foods and reduce fear around eating

✅ Smart use of meds + nutrition – not either/or, but building layered, realistic plans

She also talks about why she wrote her latest book as “the textbook I never had”—a way to arm fellow clinicians with real-world, evidence-based GI practice gems that don’t live in one neat place anywhere else.
For providers, this is the big takeaway👇
🔎 When you combine:
accurate diagnostics (like CDI’s hydrogen & methane breath testing for SIBO, IMO & carb malabsorption),

accessible tools (fiber, enzymes, OTC supports), and

educated, empowered patients…

…you get care plans that are more effective, more sustainable, and way more human.
🎧 Tune in to Episode 3 of the Modern Gastro Podcast to hear Tamara and Craig talk:
How to use simple tools in a sophisticated way

Why we should stop dismissing OTC options as “too basic”

How better diagnostics + smarter interventions can change a patient’s daily life

👉 Listen now: https://commdx.com
And if you’re looking to build more precise, patient-centered GI care, explore CDI’s at-home breath testing solutions at commdx.com.

🍁 Happy Thanksgiving from Commonwealth Diagnostics International (CDI) 🍁Today, we’re especially grateful for the people ...
11/28/2025

🍁 Happy Thanksgiving from Commonwealth Diagnostics International (CDI) 🍁

Today, we’re especially grateful for the people who make better digestive health possible:

🩺 Providers & care teams who insist on evidence-based medicine and compassionate care

🧪 Lab professionals who protect accuracy at every step

🧍‍♀️ Patients & families who trust us on their path to answers

🤝 Partners across the GI community advancing research, access, and outcomes

Your commitment fuels our mission to deliver Breath Testing Done Right—accurate, accessible diagnostics that help turn uncertainty into clarity.

From all of us at CDI: may your day be full of good food, good company, and zero GI guesswork. 🦃

Learn more about our at-home hydrogen & methane breath tests: commdx.com

If the test is at home, it can’t be as accurate.🚫 Myth: At-home breath testing is less accurate than in-clinic testing.✅...
11/25/2025

If the test is at home, it can’t be as accurate.

🚫 Myth: At-home breath testing is less accurate than in-clinic testing.

✅ Fact: When done properly, it can be just as rigorous—and far more accessible.

Here’s what makes CDI’s at-home model different:

🧪 Standardized collection protocols aligned with North American Consensus & ACG

⏱️ Guided timing and intervals built directly into kit instructions

🧴 Validated sample stability to protect hydrogen & methane levels in transit

🔗 Required kit registration to eliminate misidentified or “orphaned” samples

🧬 Gas chromatography (GC) analysis in a CLIA-certified lab

The result? Non-invasive, patient-friendly testing that still checks every box for clinical-grade accuracy.

📖 Learn more about how workflow and methodology drive reliable results at commdx.com

11/22/2025

🌡️ “If your whole life is built around your bowels… it’s time to get help.”
🎙️ Functional Friday | Modern Gastro Podcast
Featuring Tamara Duker Freuman, MS, RD, CDN
Hosted by Craig S. Strasnick | Powered by Commonwealth Diagnostics International (CDI)

On this episode of the Modern Gastro Podcast, GI dietitian and author Tamara Duker Freuman gives a simple gut-check for knowing when it’s not “just a little stomach issue” anymore.
She puts it bluntly:
“If your GI function is occupying more than 30 seconds a day of your mindshare…
if you’re waking up hours before work, skipping social events, rearranging your travel, or contorting your life around your bowels…
you should get some help.”
🚩 This is your sign to take symptoms seriously if:
You’re constantly planning life around bathroom access

You avoid travel, dates, or meals because of fear of flares

You wake up early just to “see how your gut is going to behave”

You feel like digestive symptoms run your schedule more than you do

Tamara’s reminder hits hard:
“That’s not normal—and you shouldn’t have to live like that.
There are very, very few people we can’t help improve.
There are solutions for almost every condition.”
For many patients, that path forward starts with better clarity:
Is it really IBS, or is there SIBO/IMO underneath?

Is there carbohydrate malabsorption (lactose, fructose, etc.) making symptoms worse?

Are we missing something that objective testing could reveal?

🔬 Where CDI fits in
Commonwealth Diagnostics International supports this more proactive, patient-centered approach with:
At-home hydrogen & methane breath testing for SIBO, IMO & carb malabsorption

CLIA-certified lab processing & guideline-aligned protocols

Tools that help providers move beyond “wait and see” into targeted, informed care

💬 Big takeaway:
You don’t have to rearrange your life around your bowels.
And as Tamara puts it, even if you can’t get to 100%, you can get to much better.
🎧 Catch the full conversation with Tamara & Craig on Episode 3 of the Modern Gastro Podcast and learn:
When it’s time to escalate from “tolerating” to treating

How diet, diagnostics, and multidisciplinary care work together

Why no one should be dismissed or told to just “live with it”

👉 Listen now at commdx.com

🔬 Breath Testing Done Right = More Than Just a KitAt CDI, “Breath Testing Done Right” isn’t a tagline—it’s a checklist:✔...
11/19/2025

🔬 Breath Testing Done Right = More Than Just a Kit

At CDI, “Breath Testing Done Right” isn’t a tagline—it’s a checklist:

✔️ Evidence-based timing
• 2.5–3 hour tests
• Samples every 15–20 minutes

✔️ Validated interpretation criteria
• H₂ rise ≥20 ppm within 90 minutes for SIBO
• Methane ≥10 ppm = clinically relevant IMO

✔️ Substrate flexibility
• Glucose and lactulose options to match clinical scenarios

✔️ Robust workflow
• Kit registration to lock in correct patient–sample mapping
• CLIA-certified lab with rapid turnaround

When all of these pieces work together, breath testing stops being “just another test” and becomes a decision-making tool providers can rely on.

👉 Explore how CDI structures every step around accuracy and clinical utility at commdx.com

11/17/2025

💡 Did You Know? Symptoms Alone Rarely Tell the Full Story.

Bloating, pain, constipation, diarrhea—these are common across IBS, SIBO, IMO, and carbohydrate malabsorption. On symptoms alone, it’s nearly impossible to reliably tell them apart.

That’s where hydrogen & methane breath testing comes in:

🧪 Helps differentiate SIBO/IMO from functional or motility-driven issues

🎯 Identifies carbohydrate malabsorption (e.g., lactose, fructose)

📊 Supports more precise, targeted treatment plans instead of guesswork

At CDI, we see breath testing as a bridge between symptoms and strategy—turning vague complaints into actionable patterns clinicians can treat.

🔗 Read the full article,
“Why Symptoms Alone Aren’t Enough: The Critical Role of Breath Testing in Functional GI Diagnostics” at commdx.com

11/15/2025

🌟 When “IBS” Isn’t Acting Like IBS 🌟
Modern Gastro Podcast – Episode 3 with Tamara Duker Freuman, MS, RD, CDN
Hosted by Craig S. Strasnick | Powered by Commonwealth Diagnostics International (CDI)
On Episode 3 of the Modern Gastro Podcast, GI dietitian and author Tamara Duker Freuman drops a truth bomb that a lot of patients and providers need to hear:
“Someone with actual IBS will almost definitely respond to one of the many, many interventions we have… If you have someone who carries an IBS diagnosis who doesn’t respond to any of these things, rather than write them off and say, ‘Well, it’s all in your head,’ maybe we have to step back as providers and say, ‘Hey, I wonder if they actually have IBS.’”
💡 Why this matters:
IBS has become a “catch-all” label for a lot of people with chronic gut symptoms. But if a patient:
Doesn’t respond to soluble fiber

Gets no meaningful change on a low FODMAP diet

Has little benefit from antispasmodics or standard IBS meds

Keeps being told “everything looks normal”

…then the answer isn’t “it must be in your head.”
The answer might be: we’re missing something.
⚠️ In these cases, it may be time to rethink the diagnosis and look deeper for:
SIBO or IMO

Carbohydrate malabsorption (lactose, fructose, etc.)

Bile acid malabsorption

Celiac disease or IBD

Pelvic floor dysfunction or motility disorders

This is exactly where objective testing, like hydrogen & methane breath testing, can help move care from “guess-and-check” to targeted and informed.
🔬 How CDI fits in:
Commonwealth Diagnostics International (CDI) supports this more thoughtful, investigative approach with:
At-home hydrogen & methane breath tests for SIBO, IMO, and carb malabsorption

CLIA-certified lab processing and guideline-aligned protocols

Tools that help providers confirm or refine a diagnosis instead of treating in the dark

🩺 Takeaway for providers:
If a patient isn’t responding to well-run IBS therapies, don’t assume non-compliance or “psych.”
Ask:
“Is this truly IBS—or is it something else we haven’t tested for yet?”
🎧 Catch the full conversation with Tamara & Craig on Episode 3 of the Modern Gastro Podcast and hear more about:
When to question an IBS diagnosis

How dietitians can help untangle complex symptom patterns

Where breath testing and other diagnostics fit into a more precise, compassionate care strategy

👉 Listen & learn more at commdx.com

🔬 Lesson from the Lab: The Step That Protects Your DataIn breath testing, most people focus on how the sample is collect...
11/12/2025

🔬 Lesson from the Lab: The Step That Protects Your Data

In breath testing, most people focus on how the sample is collected. But there’s a step before collection that quietly protects accuracy, turnaround, and patient experience: kit registration.

When patients register their kit before testing, it:

🔗 Links samples directly to the correct patient record

⚡ Speeds up reporting and clinical decision-making

✅ Increases adherence to prep and collection instructions

🧩 Reduces mismatched, delayed, or “mystery” samples in the lab

At CDI, we’ve seen that simple, guided kit registration isn’t just an admin step—it’s a built-in quality control checkpoint.

💡 Small workflow detail. Big impact on compliance and outcomes.

👉 Read the full breakdown on our blog:
“How Kit Registration Drives Patient Compliance and Clinical Outcomes” at commdx.com

11/07/2025

When your bowels are out of control, everything is on hold.

🎙 Functional Friday | Modern Gastro Podcast x Tamara Duker Freuman, MS, RD, CDN
Sponsored by Commonwealth Diagnostics International (CDI)

On this week’s Functional Friday spotlight, we’re sitting with a moment from our conversation with Tamara Duker Freuman – registered dietitian, author of REGULAR: The Ultimate Guide to Taming Unruly Bowels and Achieving Inner Peace, and one of the most trusted voices in digestive nutrition.

Tamara treats patients who aren’t just “a little uncomfortable.” She’s working with people whose bowels are running their lives.

💬 “That’s not an overstatement. It really gives you your life back.
Patients having accidents or near-accidents at the supermarket or on public transportation—that’s devastating.
I’ve had teachers who stopped working because they couldn’t leave a classroom of young kids to go to the bathroom.
So when you finally get your bowels under control after a chronic, lifelong GI condition, it’s not hard to see how that has a truly life-changing impact on mental health and quality of life.”

This is what we’re really talking about when we talk “irregularity”:

People avoiding restaurants, long drives, or vacations

Careers put on pause because bathrooms aren’t accessible

Constant anxiety about proximity to a toilet

The invisible mental load of “What if I can’t hold it?” every single day

🧩 What Tamara makes crystal clear in this episode:
Managing bowel habits isn’t “cosmetic GI care.” It’s core quality-of-life medicine.

And that work is most effective when it’s:

🧪 Guided by good diagnostics – like validated breath testing for SIBO/IMO and carb malabsorption

🥗 Supported by targeted nutrition – fiber strategies, food triggers, and realistic routines

🧠 Backed by mindset + coping tools – because chronic bathroom fear is a mental health burden too

At CDI, we’re proud to support this kind of patient-centered care by giving providers clear, non-invasive data to help explain why someone’s bowels are so unpredictable—so the right dietary, behavioral, and medical interventions can follow.

If you work with patients who:

Won’t travel because of their bowels

Sit on the aisle only, “just in case”

Have built their lives around bathroom access

…this conversation is worth your time.

🎧 Listen to the full episode:
👉 Modern Gastro Podcast – A Chat with Tamara Duker Freuman
(Available on commdx.com and major podcast platforms)

📚 Learn more about Tamara & her work:
🌐 Website: search “Tamara Duker Freuman New York Gastroenterology Associates”
📖 Book: REGULAR: The Ultimate Guide to Taming Unruly Bowels and Achieving Inner Peace

🔬 Learn how CDI supports functional GI care with non-invasive breath testing:
➡️ commdx.com

🚨 New Research Spotlight: Clinical Evidence Strengthens Support for Breath Testing in SIBO 🚨Commonwealth Diagnostics Int...
11/05/2025

🚨 New Research Spotlight: Clinical Evidence Strengthens Support for Breath Testing in SIBO 🚨

Commonwealth Diagnostics International (CDI) is excited to highlight a newly published 2025 clinical study that reinforces the value of hydrogen and methane breath testing (HMBT) in the diagnosis of Small Intestinal Bacterial Overgrowth (SIBO).

🧪 About the Study
A research team in Sweden published “Refined Lactulose Hydrogen Breath Test for Small Intestinal Bacterial Overgrowth Subgrouping Irritable Bowel Syndrome With Low and High Breath Hydrogen” in Gastroenterology Research and Practice (2025). The study analyzed breath test data from 190 subjects across three distinct clinical groups, evaluating diagnostic criteria to optimize accuracy in SIBO detection.

Key Findings Include:
🔹 39% of IBS patients met the breath test criteria for SIBO
🔹 A hydrogen rise of ≥20 ppm within 80 minutes delivered 77% sensitivity and 88% specificity for SIBO diagnosis
🔹 Post-antibiotic treatment led to improved outcomes for high-hydrogen patients

🌐 Why Substrate Choice Still Matters
The study reinforces the value of lactulose for identifying bacterial overgrowth in the distal small intestine—regions glucose-based tests may not adequately reach.

At CDI, we support substrate flexibility:
✔️ Both lactulose and glucose options available
✔️ Enables tailored testing based on patient profile
✔️ Optimizes detection across small bowel regions

✅ How This Aligns with CDI’s Clinical Standards
CDI's breath testing approach already reflects these best practices:
✔️ Hydrogen + methane analyzed on every test
✔️ 24-hour turnaround from a CLIA-certified lab
✔️ Substrate options for personalized testing
✔️ Pediatric and adult test kits available
✔️ At-home sample collection for convenience and compliance

For providers managing patients with unexplained GI symptoms—including suspected SIBO or IBS—this study underscores why breath testing remains a cornerstone of non-invasive GI diagnostics.

📖 Read the full CDI summary and clinical implications:
👉 https://commdx.com/new-study-validates-the-clinical-utility-of-hydrogen-methane-breath-testing-for-sibo/

🩺 Are you a provider looking to optimize your functional GI workup?
Contact explore CDI’s hydrogen & methane breath testing solutions.

🧬 CDI is headed to Chicago for NASPGHAN 2025! 🧬We’re excited to share that Commonwealth Diagnostics International (CDI) ...
10/31/2025

🧬 CDI is headed to Chicago for NASPGHAN 2025! 🧬

We’re excited to share that Commonwealth Diagnostics International (CDI) will be exhibiting at the NASPGHAN 2025 Annual Meeting — November 5–8 in Chicago — and we’d love to connect with you there.

📍 Visit us at Booth #508

Whether you’re focused on pediatric IBS, functional abdominal pain, constipation, carbohydrate malabsorption, or suspected SIBO/IMO, CDI supports clinicians with noninvasive, clinically validated hydrogen and methane breath testing that’s easy for families and actionable for providers.
Here’s what you can learn at our booth:
✅ Pediatric-friendly breath testing workflows – at-home collection, clear instructions, and strong sample stability
✅ Why testing for BOTH hydrogen and methane matters in pediatric constipation and functional GI disorders
✅ How CDI aligns with NASPGHAN/North American Consensus standards for timing, prep, and interpretation
✅ How to integrate breath testing into your practice to reduce guesswork and support evidence-based nutrition therapy
✅ Reimbursement, ordering, and EMR-friendly reporting

👧👦 Pediatric patients deserve the same diagnostic accuracy as adults — without the burden of invasive testing. Our goal is to make that possible.

🗓️ Event: NASPGHAN 2025
📍 Location: Chicago, IL
🧪 CDI Booth: #508
🔗 Event info: https://lnkd.in/etQCfFUX

If you’ll be in Chicago, stop by and let’s talk about how we can help your team deliver more precise answers, faster, for your pediatric GI patients.

📸 Live from in Phoenix!The CDI team is on-site at Booth 1108, meeting with GI professionals and demonstrating how our ...
10/28/2025

📸 Live from in Phoenix!

The CDI team is on-site at Booth 1108, meeting with GI professionals and demonstrating how our lab-first model elevates diagnostic accuracy.

✅ SIBO/IMO + carb malabsorption insights
✅ Hands-on breath test demos
✅ Practice tools you can use right away

Whether you're optimizing your diagnostic workflow or exploring at-home testing, stop by and see Breath Testing Done Right in action.

📍 Booth 1108 | Phoenix, AZ

🔗 Learn more: commdx.com

Address

Salem, MA

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Telephone

+18882585966

Website

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