Irritable bowel syndrome (IBS) is classified as a disorder of gut-brain interaction (DGBI) by the Rome Foundation, an independent not-for-profit organization made up of an international committee of gastroenterology experts that defines the diagnostic criteria for this condition. IBS symptoms are characterized by chronic, episodic abdominal pain and altered bowel habits. IBS frequently presents with bloating, straining and/or urgency, and is not explained by structural abnormalities (Tack 2017). Psychological co-morbidities are common as up to one-third of individuals with IBS experience anxiety or depression (Staudacher 2023). The conceptual model of the pathophysiology of IBS is evolving, as gut microbiome research continues to advance it becomes evident that alterations in gut flora appear to play a key role. The previous notion that IBS is a psychosomatic disorder is challenged as emerging data reveals that in up to half of those with IBS, alterations in gut symptoms preceded the onset of mood disorders (Jones 2017). The estimated prevalence of IBS using Rome IV criteria in the United States ranges from 4.7% to 5.3%, although these estimates arise from studies with relatively small sample sizes (Alimario 2023). An international survey revealed that IBS patients were willing to give up 25% of their remaining life for a treatment that would provide complete symptom relief, revealing the enormous impact of IBS on quality of life (Drossman 2009). 

In Chapter 1, you will learn about the pathophysiology, pathogenesis, and diagnostic criteria of IBS. In Chapter 2, the low fermentable oligosaccharide, disaccharide, monosaccharide and polyol (FODMAP) diet approach examines how commonly malabsorbed fermentable fibers and sugars contribute to IBS symptoms. You will learn how to identify foods containing these poorly absorbed FODMAPs. Chapter 3 will focus on different fibers and their role in IBS. Chapter 4 reveals the physiologic role of fat in stimulating the gastro-colic reflex and intestinal motility. The impact of co-morbid conditions associated with fat malabsorption will be further elucidated. Review of the digestive process will unfold in Chapter 5, with an introduction to key strategies to enhance digestion and minimize malabsorption. Dietary indulgences such as alcohol and caffeine may wreak havoc on the gastrointestinal tract as detailed in Chapter 6. The basics to help clients manage their IBS symptoms in their everyday life including grocery shopping, menu planning, traveling, and lifestyle changes will be reviewed in Chapter 7. Appreciating the role of the gut microbiome and its potential role in IBS will be covered in Chapter 8, will expand your IBS treatment toolbox with information on other treatments such as pharmaceuticals, behavioral strategies, supplements, and herbal remedies strategies. 

This continuing education activity is designed to help you earn 8.0 continuing education credits for dietetics (CDR CPEU).