Digestive enzymes benefits: how they work and when to take them

What are digestive enzymes?

Digestive enzymes are proteins that break food down into pieces small enough for your body to absorb.

Your body makes its own, mainly in the pancreas and the lining of the small intestine. Different enzymes handle different parts of a meal: proteases work on protein, amylases on starch, lipases on fat and lactase on the sugar in milk. A digestive enzyme supplement adds to the enzymes your body already makes.

What are the benefits of digestive enzymes?

The clearest benefits come from specific enzymes matched to specific foods, such as lactase for dairy and alpha-galactosidase for beans.

In other words, an enzyme supplement is most useful when it matches the job. Lactase only works on lactose, and alpha-galactosidase only works on the sugars found in beans and pulses. Neither will help with a meal that does not contain those foods, which is why it pays to notice what actually triggers your discomfort.

Broad "all-in-one" enzyme blends are popular, but there is much less research on them in healthy people. If a particular food tends to leave you uncomfortable, a targeted enzyme is the most evidence-led place to start.

Lactase for dairy

Lactase is the enzyme with the strongest support, because it has an authorised health claim: lactase improves lactose digestion in people who have difficulty digesting lactose.

According to the NHS, lactose intolerance can cause stomach pain, bloating, wind, rumbling, diarrhoea and feeling sick, usually within a few minutes or hours of having dairy. The NHS says taking a lactase supplement before food or drink containing lactose may reduce symptoms for some people.

The authorised claim applies to supplements providing at least 4,500 FCC units of lactase, taken with each meal that contains lactose. The claim's conditions also note that tolerance to lactose varies, so you may need to find the amount that works for you. Read more on our lactase page.

The NHS also advises against cutting foods out of your diet without speaking to a GP or dietitian first.

Alpha-galactosidase for beans and pulses

Alpha-galactosidase breaks down the complex sugars in beans, lentils and some vegetables, and one small trial found it reduced wind after a bean-rich meal.

In a 1994 double-blind crossover study, 19 people ate a meatless chilli with either alpha-galactosidase or a placebo. Over the next six hours, those taking the enzyme had fewer episodes of wind per hour overall, although the difference was only significant at one of the hourly checks. There was no difference in bloating or stomach pain.

That is encouraging but limited evidence, from a single small study.

Broad-spectrum enzyme blends

Blends combine several enzymes to cover protein, starch, fat and fibre in one capsule, but they have less human research behind them.

You will often see protease, amylase, lipase and cellulase alongside plant enzymes such as bromelain (from pineapple) and papain (from papaya). Some also include herbs like ginger, fennel and turmeric, which is traditionally used in Ayurveda to support digestion. These blends suit people who want general mealtime support, rather than help with one particular food.

Enzymes compared

Enzyme	What it breaks down	Evidence
Lactase	Lactose, the sugar in milk	Authorised claim for improving lactose digestion in people who struggle with it
Alpha-galactosidase	Complex sugars in beans and pulses	One small 1994 trial: less wind, no change in bloating or pain
Protease, amylase, lipase	Protein, starch and fat	Prescription versions are used for medical conditions; limited research in healthy people
Bromelain, papain	Protein	Plant enzymes, mainly studied as part of blends

Prescription enzymes are different

Some people need prescription enzymes, and supplements are not a replacement for them.

The NHS explains that pancreatic enzyme replacement therapy, such as Creon, is prescribed when the pancreas does not make enough digestive enzymes, a condition called exocrine pancreatic insufficiency. It is taken with meals and snacks, as directed by a doctor. If you have been prescribed enzymes, do not swap them for a shop-bought product.

When should you take digestive enzymes?

Take digestive enzymes with, or just before, the meal you want them to help with, because they work on the food in your gut at the time.

• Lactase works best taken with each meal or drink containing lactose, as the authorised claim sets out.
• Alpha-galactosidase is taken with a meal containing beans or pulses, as it was in the 1994 trial.
• Broad-spectrum blends are usually taken at the start of main meals. Follow the directions on the label.

Who should take care

• See your GP if digestive symptoms are new, persistent or worrying, especially if you are losing weight without trying, see blood in your stools or have a change in bowel habits. These need checking, not masking.
• If you are pregnant, breastfeeding or take regular medicines, ask your GP or pharmacist before starting a supplement.
• If you are allergic to pineapple or papaya, check the label for bromelain or papain.
• If you have diabetes, a pancreatic condition or have been prescribed enzymes, speak to your GP before adding a supplement.

Choosing a digestive enzyme

If dairy or beans are your main trigger, a targeted product is the natural starting point, and our gut health collection has the wider range.

Digestive Enzymes combines lactase and alpha-galactosidase, the two enzymes with the most specific evidence above. If you would prefer broader mealtime support, Digestiplex brings together protease, amylase, lipase, cellulase, lactase, bromelain and papain with ginger, fennel and turmeric. Keep a simple food diary for a couple of weeks so you can see what makes a difference for you.