The IBS trigger foods (and replacements) you should be aware of

woman holding stomach
2 November 2023

The IBS trigger foods (and replacements) you should be aware of

If you have Irritable Bowel Syndrome (IBS) and struggle with managing your symptoms, one strategy is to identify and avoid foods that worsen the condition.

IBS is a widespread digestive issue that affects many people around the world. The symptoms include abdominal pain, bloating, diarrhoea, and constipation. 

While it's not clear what causes IBS, certain foods are known to trigger or worsen these symptoms.

Being mindful about what you eat is important if you have IBS, as some foods might seem harmless but can significantly affect your condition. Identifying these trigger foods can help you manage your IBS more effectively and lead a more comfortable daily life.

Here are some common trigger foods:

  • Insoluble fibres like pasta, brown rice, and some vegetables
  • Gluten found in wheat, barley, and rye
  • Dairy products like milk and cheese
  • Caffeine in coffee, energy drinks, and carbonated drinks
  • Fried foods

Insoluble Fibres

Insoluble fibres are present in many foods, including whole grains, certain vegetables, and bran. These fibres can be challenging for people with Irritable Bowel Syndrome (IBS) because they do not dissolve in the gut and maintain their structure throughout digestion.

For those who often experience constipation, foods rich in insoluble fibre can irritate the sensitive lining of the intestines. This irritation can lead to abdominal discomfort and cramping.

Additionally, when the body processes insoluble fibre, it can increase flatulence and bloating, other common symptoms associated with IBS.

Some familiar sources of insoluble fibre are:

- Whole wheat bread and pasta
- Whole grains like brown rice
- Vegetables such as cauliflower, broccoli, and bell peppers

Gluten

Gluten is a protein in wheat, barley, and rye. If you have gluten sensitivity, you may also have IBS, which can lead to inflammation of the gut. This irritation can cause symptoms such as bloating, stomach pain, and diarrhoea.

Foods that typically contain gluten are:

  • Bread
  • Pasta
  • Cereals
  • Beer
  • Baked items like cookies and cakes

Dairy

Dairy products are a major cause of IBS symptoms due to their high lactose content. Lactose is a natural sugar found in milk and other dairy products.

Some people with IBS lack the enzyme needed to digest lactose effectively, which can lead to bloating, gas, diarrhoea, and sometimes constipation.

Everyday dairy products include:

  • Milk
  • Yoghurt
  • Ice cream

Fried Food

Foods high in unhealthy fats can be problematic for people with IBS because the body finds these fats hard to digest. This slower digestion process can cause symptoms like bloating and stomach pain. Fried foods, typically cooked in oils that may inflame the gut, can irritate it further and worsen symptoms. Additionally, they might alter the gut bacteria balance, leading to irregular bowel habits.

Common fried foods include:

  • Chips
  • Fried chicken
  • Onion rings
  • Mozzarella sticks
  • Doughnuts

Caffeine

Caffeine is a widely enjoyed stimulant but can significantly affect individuals with IBS. It increases the frequency of intestinal muscle contractions, leading to more urgent and frequent bowel movements. 

Additionally, caffeine's diuretic properties can cause dehydration, making stools harder and more challenging to pass, potentially leading to constipation in people with IBS. Furthermore, caffeine can impact sleep quality, which over time may lead to increased stress and anxiety, both of which can trigger IBS symptoms.

Common sources of caffeine include:

  • Coffee and tea
  • Soft and fizzy drinks
  • Chocolate, particularly dark chocolate
  • Energy drinks

Managing your IBS

Keeping on top of your Irritable Bowel Syndrome largely depends on your diet. Keep in mind that everyone's IBS is unique, so what triggers your symptoms may not affect someone else the same way.

It's important to know which foods to avoid and find suitable alternatives that help create a balanced diet. Eating mindfully and slowly calmly can also help minimise stress-related IBS symptoms.

There are many alternative food options available for those sensitive to IBS, including:

  • Lactose-free milk
  • Soluble fibres like bananas and oats
  • Healthy fats such as avocados and nuts
  • Herbal teas, including peppermint and ginger tea

If your IBS symptoms are worsening, talk to your doctor for advice on lifestyle changes and potential medications.

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