While irritable bowel syndrome and inflammatory bowel disease share some symptoms, they are completely different illnesses. 

Irritable Bowel Syndrome (IBS)


Irritable bowel syndrome, or IBS, is a health issue found in your intestines. It causes persistent abdominal pain, cramping, gas, bloating and change in stool - some combination of chronic diarrhea and constipation. If you are suffering from these symptoms, you're not alone. Nearly 40 million Americans suffer from IBS. 

There are three types of IBS: diarrhea-predominant, constipation-predominant and mixed-type (where diarrhea and constipation both persist). IBS does not cause lasting harm to the bowels and does not lead to cancer; however, it can severely impair you physically and emotionally

Here is an excellent patient guide to IBS put together by the American Gastroenterological Society: AGA Patient Guide to IBS

Inflammatory Bowel Disease (IBD)


Inflammatory bowel disease, or IBD, is a long-term health issue that causes swelling and sores in the gastrointestinal tract.

IBD causes your immune system to think that food in the intestine is not supposed to be there. The body then attacks the cells of the bowels, causing inflammation and ulcerations.


There are two main types of inflammatory bowel disease: ulcerative colitis and Crohn’s Disease. Symptoms of IBD, like symptoms of IBS, include diarrhea and abdominal pain; however, in addition to these, IBD symptoms also include rectal bleeding, joint pain, eye irritation and rashes. 

Here is an excellent patient guide to IBD published in the journal Clinical Gastroenterology and Hepatology: Inflammatory Bowel Disease.

Is There a Test for IBS?

ibs-smart™ is a blood test that can quickly and accurately diagnose IBS. It’s the only licensed, patented test that can measure validated biomarkers in your blood that indicate IBS with 96% - 100% certainty (the test is over 90% specific in differentiating IBS from other diarrheal diseases like IBD)

By accurately diagnosing your IBS and identifying the cause (a microbiome disruption caused by an infection), ibs-smart™ can expedite your path to treatment and prevent years of potentially unnecessary procedures like colonoscopies.

You can order the test through an telehealth prescriber or request a testing kit to take to your next doctor’s appointment.

IBS After Food Poisoning

A significant volume of research shows a clear link between food poisoning and irritable bowel syndrome (IBS).

Chronic Diarrhea & IBS

Chronic diarrhea can indicate disorders, such as inflammatory bowel disease (IBD) or irritable bowel syndrome (IBS).


While irritable bowel syndrome and inflammatory bowel disease share some symptoms, they are completely different illnesses. 

ibs-smart™️ is the only licensed, patented antibody blood test for the diagnosis of IBS. See the full list of patents here

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ibs-smart™️ is brought to patients by Gemelli Biotech. 

Learn more about our work, principles and leadership at www.gemellibiotech.com.

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