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The Surprising Connection: How ADHD Can Affect IBS

Attention Deficit Hyperactivity Disorder (ADHD) and Irritable Bowel Syndrome (IBS) are two seemingly unrelated conditions that can significantly impact a person's quality of life. While they affect different aspects of health, recent research has unveiled a fascinating connection between the two. As an IBS dietitian, who also has ADHD, I'm here to shed light on how ADHD can affect IBS and the importance of considering this link in managing these conditions effectively.

Understanding ADHD and IBS

Before we delve into the connection between ADHD and IBS, let's briefly understand these two conditions:

ADHD (Attention Deficit Hyperactivity Disorder)

ADHD is a neurodevelopmental disorder characterised by symptoms such as inattention, hyperactivity, and impulsivity. It primarily affects cognitive functions and behaviour and is commonly diagnosed in childhood. However, it can persist into adulthood, affecting daily life, work and relationships.

IBS (Irritable Bowel Syndrome)

IBS is a gastrointestinal disorder that affects the digestive system. Common symptoms include abdominal pain, bloating, diarrhoea, constipation and irregular bowel movements. It is considered a functional disorder, meaning there are no visible structural abnormalities, but it can be intensely uncomfortable and distressing.

The ADHD-IBS Connection

Recent studies have shown a surprising connection between ADHD and IBS, suggesting that people with ADHD may be more prone to developing IBS. Here are some key factors contributing to this link:

Stress and Emotional Dysregulation

People with ADHD often experience higher levels of stress and emotional dysregulation due to their difficulty in managing attention and impulsivity. Stress is a known trigger for IBS symptoms like bloating, abdominal pain and altered bowel habits, and emotional factors play a significant role in its exacerbation.

Diet and Nutrition

Dietary habits can significantly impact both ADHD and IBS. People with ADHD can struggle with impulsivity, which can lead to overeating and less nutritious food choices. They are also more likely to skip meals, which can exacerbate IBS symptoms.

Gut-Brain Axis

The gut-brain axis is a complex bidirectional communication system between the gut and the brain. Changes in the gut microbiota are seen in both ADHD and IBS and this can affect brain function and behaviour. Changes in brain function can influence gut function, and vice versa. For those with ADHD, these connections might work differently, which can then affect digestion.

Managing ADHD and IBS Together

Recognising the connection between ADHD and IBS is crucial for healthcare professionals and those living with these conditions. Here are some strategies to help you manage these conditions together:

1. Dietary Modifications

Work with a specialised IBS dietitian to help you identify your unique trigger foods for your IBS and implement an IBS and ADHD friendly diet that that suits your specific needs that focuses on balanced nutrition and supports your overall health. This will help you relieve your tummy troubles and improve your mental health.

2. Focus on Mindful Eating

Pay attention to what you eat, how it tastes and how it affects your gut and mood. This can help you identify triggers and feel more satisfied after means so you can make more informed food choices.

3. Stress Management

Explore stress reduction techniques such as mindfulness, meditation, yoga or therapy to manage emotional dysregulation and reduce IBS flare-ups.

4. Lifestyle Changes

Prioritise healthy lifestyle habits that include regular joyful movement, adequate sleep, good eating habits, self-care and a consistent daily routine to support both conditions.

5. Medication and Therapy

Those with ADHD may benefit from medication and cognitive behavioural therapy to manage their symptoms effectively. This can indirectly help in reducing stress and its impact on IBS, thereby improving gut symptoms.

The connection between ADHD and IBS is an intriguing development in the field of healthcare. While more research is needed to fully understand the link, it is clear that managing these conditions together can lead to improved overall well-being. As an IBS dietitian, my goal is to emphasise the importance of a holistic approach to health, where diet, lifestyle, and emotional well-being are all considered in the treatment plan. By addressing both ADHD and IBS comprehensively, people can find relief and lead healthier, more fulfilling lives. If you or a loved one are dealing with these conditions, consulting with a healthcare professional for personalised guidance and support is key.


If you're feeling stuck and would like to learn more about how I can help you break free from the cycle of discomfort and unpredictability of living with IBS, CLICK HERE to book a Complementary Strategy Call and let's chat about your journey to finding lifelong relief and reclaiming your confidence and control over your IBS!



  1. Checa-Ros A, Jeréz-Calero A, Molina-Carballo A, Campoy C, Muñoz-Hoyos A (2021). Current Evidence on the Role of the Gut Microbiome in ADHD Pathophysiology and Therapeutic Implications. Nutrients. 13: 249.

  2. Kedem S, Yust-Katz S, Carter D, Levi Z, Kedem R, Dickstein A, Daher S, Kat LH (2020). Retrospective Cohort Study: Attention deficit hyperactivity disorder and gastrointestinal morbidity in a large cohort of young adults. World Journal of Gastroenterology. 26(42): 6626-6637.

  3. Longstreth GF, Thompson WG, Chey WD, Houghton LA, Mearin F, Spiller RC (2006). Functional bowel disorders. Gastroenterology. 130: 1480–1491.

  4. National Institute for Health and Care Excellence (NICE) (2008). Irritable bowel syndrome in adults: Diagnosis and management of irritable bowel syndrome in primary care. CG61.


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