Irritable bowel syndrome (IBS) is a condition of the digestive system. It can cause a variety of uncomfortable symptoms.
Symptoms of IBS include:
These symptoms are also common in other bowel conditions. It's important to consult a doctor to rule out other conditions before IBS can be diagnosed.
Up to 30% of Australians suffer from IBS. The condition occurs more often in females. While it can present at any age, it most often occurs before the age of 40.
The causes of IBS are often unclear, but many people find it presents after an episode of gastroenteritis, food poisoning, infection, illness or chronic stress.
Food plays a role in symptom induction for many people, but the foods that trigger IBS symptoms will vary for each person.
Symptoms and severity often change over time. Periods of high stress are known to worsen IBS symptoms in some people.
IBS is a chronic condition, requiring long-term management, but symptoms can wax and wane over time and treatment may only be required intermittently.
Various management strategies exist for IBS. These include prescribed and over-the-counter medications, and drug-free approaches.
Gut-directed hypnotherapy is gaining increasing attention for its efficacy in managing IBS symptoms. This is an alternative or complimentary treatment option alongside dietary management.
Often, changes to your diet are all it takes to improve or lessen IBS symptoms. Working with an Accredited Practising Dietitian (APD) can help you identify which foods and food groups are your personal triggers. This allows you to reduce your intake of these triggers, without missing out on key nutrients in your diet.
Dietary strategies are very effective in managing the symptoms of IBS. While foods which trigger symptoms are different for everyone, general dietary tips include:
Some people will have an improvement in their IBS symptoms by adopting a high fibre diet and eating more wholegrains and fruit and vegetables. A more specific strategy for addressing IBS is to adopt a low-FODMAP diet for two to six weeks to help identify trigger foods.
FODMAP stands for Fermentable Oligosaccharides, Disaccharides, Monosaccharides and Polyols. These are types of carbohydrate (sugar), which are not well absorbed in the small intestine.
When these carbohydrates are poorly absorbed they travel to the large intestine. There they attract water into the gut and are fermented by the gut bacteria, creating gas.
The increased water can result in diarrhoea for some people. The gas resulting from fermentation can also lead to symptoms of bloating, constipation, flatulence and pain.
Common high FODMAP foods include garlic, onion, apples, milk, mushrooms, bread and chickpeas.
Research has proven that following a low FODMAP diet is the most effective way of managing IBS. Three in four people see improvements in their symptoms after adopting a low FODMAP diet.
By reducing your intake of high-FODMAP foods, symptoms of IBS can improve within weeks. We call this a 'low FODMAP diet'.
An Accredited Practising Dietitian (APD) can guide you through a series of food reintroductions. These reintroductions can help work out which FODMAPs and foods are triggering symptoms.
While a strict low-FODMAP diet can be a diagnostic tool, it's not recommended you stick to it in the long term.
It's important to avoid restricting all high-FODMAP foods if possible, because:
We recommend seeing a dietitian if you:
Accredited Practising Dietitians (APDs) are university-qualified nutrition experts. They can provide personalised, evidence-based advice.
APDs are Australia's most qualified dietetics professionals.
