Living with Irritable Bowel Syndrome (IBS) can feel like navigating a minefield of food triggers, unpredictable symptoms, and conflicting advice. Bloating, gas, abdominal pain, diarrhoea, and constipation are all common struggles often leaving people searching for practical easy ways to feel better. One solution that’s gaining attention is digestive enzymes. But do digestive enzymes help in IBS? Which ones are worth trying? And how do you use them?

This comprehensive guide explores what digestive enzymes are, how they work, what the research says, and whether they might help ease IBS symptoms.

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What Are Digestive Enzymes?

Digestive enzymes are proteins that help break down and absorb the proteins, fats and carbohydrates from food.

Key Types of Digestive Enzymes

• Proteases: Break down proteins
  
• Lipases: Break down fats
  
• Amylases: Break down carbohydrates
  

These enzymes are naturally produced by the gut. Your body produces them in the mouth, stomach, pancreas, and small intestine as part of the digestion process so most people do not require supplementation.

However, if your body is unable to break down certain foods properly, these supplements may reduce symptoms such as gas, bloating, abdominal pain or diarrhoea. In certain conditions such as pancreatic insufficiency enzyme supplementation is essential.

Enzyme Deficiency and Symptoms

A deficiency in specific digestive enzymes like lactase (the enzyme that breaks down lactose, the sugar found in milk and dairy products) may contribute to IBS-like symptoms. While IBS is not caused by enzyme deficiency, certain undigested carbohydrates can worsen symptoms in sensitive individuals.

IBS and Digestion: What Goes Wrong?

IBS is a disorder of the gut brain interaction, meaning the digestive system looks normal on tests but doesn’t function optimally. Several factors contribute:

• Altered gut motility: Food moves too quickly or too slowly
  
• Visceral hypersensitivity: Heightened sensitivity to normal digestive processes
  
• Gut–brain axis dysregulation: Stress and emotional triggers impact digestion
  

How Malabsorption Leads to Gas and Bloating

Carbohydrate malabsorption is a major contributor to bloating in IBS. When certain carbohydrates aren’t fully digested, they reach the colon where gut bacteria ferment them, producing gas which leads to bloating, distension, and discomfort.

These poorly digested carbohydrates are known as FODMAPs. FODMAPs are fermentable carbohydrates that act as prebiotics and are beneficial for gut health. However in individuals with IBS their consumption can contribute to symptoms.  

While digestive enzymes won’t fix IBS itself, some targeted enzyme supplements may help break down specific FODMAPs and reduce symptoms.

Which Digestive Enzymes May Help With IBS?

Not all digestive enzymes are effective for IBS. The ones with the most potential are those that help break down FODMAPs. For enzymes to be effective and of most benefit you should work on finding out your triggers first and choose the right enzyme according to your sensitivities. 

There are several enzymes available targeting individual FODMAPs. Lactase and alpha-galactosidase have been studied in research and shown to be effective in people with IBS with lactose intolerance and galactooligosaccharide (GOS) sensitive individual respectively. Other enzymes have not been studied in research but I have seen these work for many people in clinical pratice. However, keep in mind that these do not work for everyone.

Targeted enzymes can be useful in IBS to enable people to follow a less restrictive diet and be able to enjoy eating out and social occassions without worry. Please do consult your healthcare professional before begining enzyme supplementation.

Here are some of the digestive enzymes available:

• Lactase
  This enzyme helps breakdown lactose, the sugar found in milk and dairy products. This is effective for individuals with lactose intolerance.
• Alpha-galactosidase
  This enzyme helps breakdown oligosaccharides, partcularly galactooligosacharides (GOS) found in pulses, cashews, and soy milk amongst other foods.
• Fructan hydrolase
  This enzyme breaks down the oligosacharide fructan. This is broken down into fructose and glucose. Fructans are found in wheat, rye, barley, onion, garlic and other vegetables.
• Xylose Isomerase
  This enzyme helps breakdown fructose into glucose. Fructose is found in a variety of fruit and fruit juices, syrups and is often added to food products. This enzyme may help those with fructose intolerance.

FODMAP Specific Enzyme Products

FODZYME (Kiwi Biosciences)

This product contains a combination of the following enzymes; Fructan hydrolase, Alpha-galactosidase, Lactase. These enzymes breakdown Fructans (found in wheat, onion, garlic etc.), GOS (founds in pulses), Lactose (found in milk & dairy products).

It comes as a tastless powder which is sprinkled and mixed directly into food.

FODMAP Certified: Yes, Monash Low FODMAP Certified

Want to try it? Get 15% off here

Fibractase 1200 (Intoleran)

This product contains a single enzyme; Alpha-galactosidase. This helps breakdown GOS found in pulses.

It comes in capsule form and should be taken before/ with the first bite of food. The capsule can also be opened and sprinkled onto the food.

FODMAP Certified: Yes, Monash Low FODMAP Certified

Want to try it? Get 10% off here

Quatrase 10,000 (Intoleran)

This product contains a combination of the following enzymes; Alpha-galactosidase, Xylose isomerase, Lactase, and Invertase. These enzymes help breakdown GOS (found in pulses etc), Fructose (found in fruit, honey, & juice etc), and Lactose (found in milk & dairy products).

It comes in capsule form and should be taken before/ with the first bite of food. The capsule can also be opened and sprinkled onto the food.

FODMAP Certified: Yes, Monash Low FODMAP Certified

Want to try it? Get 10% off here

Fructase (Intoleran)

This product contains a single enzyme; Xylose isomerase which helps breakdown Fructose found in fruit, honey, & juice etc.

It comes in capsule form and should be taken before/ with the first bite of food. The capsule can also be opened and sprinkled onto the food.

FODMAP Certified: Yes, Monash Low FODMAP Certified

Want to try it? Get 10% off here

Lactase (Intoleran)

It comes in capsule form or liquid form. The capsules should be taken before/ with the first bite of food. The capsule can also be opened and sprinkled onto the food.

FODMAP Certified: Yes, Monash Low FODMAP Certified

Want to try it? Get 10% off here

How to Use Digestive Enzymes

It is recommended to identify your food intolerances first by completing all three phases of the low FODMAP diet before using digestive enzymes. This ensures you can match the enzyme to your identified intolerance and see whether the enzymes are effective in improving your tolerance.

Take the enzymes according to the instructions on the product packaging. The amount of enzymes taken can be adjusted based on the amount of food consumed, FODMAP content and your tolerance level. Digestive enzyme supplements are usually taken with the first bite of a meal. Timing is important, as enzymes need to be present when the food hits the stomach. Store enzymes in a cool and dry place away from heat.

Potential Side Effects

Enzymes that breakdown fructans can contribute or worsen symptoms in individuals intolerant to fructose. This can occur because fructans break down into fructose and glucose. Work with a specialist dietitian like myself to help choose the right product for you.

Conclusion: Can Digestive Enzymes Help IBS?

Digestive enzymes aren’t a cure for IBS but they can help some people, especially when symptoms are linked to specific FODMAP sensitivities. The best approach is personalised: understand your triggers and match the enzyme to your known intolerance. Unsure of your triggers? Work with a dietitian to find the right strategy for you.