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  • Written by Clare Collins, Professor in Nutrition and Dietetics, University of Newcastle

Chronic constipation is incredibly common. Around one in four people worldwide report symptoms, while in Australia and New Zealand, it’s around one in seven.

Lots of things can trigger constipation: being out of your usual routine (think holidays, illness or injury), having a low fibre intake, not drinking enough water and inactivity.

Certain medications can also cause constipation including iron supplements, painkillers, diuretics (to help you get rid of sodium and water), and other drugs to treat heart disease, mental health conditions and allergies.

Read more: Health Check: what causes constipation?

Constipation is more common in older adults and in women, due to hormonal changes that slow bowel motility – the time it takes for your body to digest food and expel the waste products (stools or bowel motions). Pregnant women are particularly prone to constipation.

How do you know you’re constipated?

Symptoms include:

  1. lumpy or hard stools
  2. feeling that your bowels haven’t emptied completely or your anus is blocked
  3. straining to pass a bowel motion
  4. manipulating your body position to try and pass a bowel motion
  5. having fewer than three bowel motions per week.

If over a three-month period you answer yes to two or more of these symptoms most weeks, then you have “constipation”.

The good news is it can be treated and then prevented.

Had constipation? Here are 4 things to help treat it Women are more likely to become constipated than men because they experience more horomonal changes. Kongsak/Shutterstock

If your bowels are so packed you can’t pass any bowel motions at all, see your GP. You may need treatment with specific laxatives to clear your bowels before you can start on a prevention plan.

Here are four things that research shows improve bowel function, which refers to the time it takes for food to move through your digestive system and be expelled as a bowel motion (called gut transit time), the frequency and volume of bowel motions, and stool consistency.

1. High-fibre foods

Dietary fibres are complex carbohydrates that aren’t digested or absorbed in the gut.

Different types of dietary fibres improve bowel function through the following processes:

  • the fermentation of fibre in the colon produces water and other molecules. These make stools softer and easier to pass

  • absorption of water into stools stimulates the gut to contract and makes bowel motions softer

  • a higher fibre intake creates bigger stools, which pass more quickly, resulting in more regular bowel motions.

Read more: Health Check: are you eating the right sorts of fibre?

A good source of fibre is psyllium. It forms a viscous gel, which gets fermented in the colon, leading to softer bowel motions. Psyllium is the main ingredient in Metamucil, which is commonly used to treat constipation.

Had constipation? Here are 4 things to help treat it Psyllium is a type of fibre that helps soften bowel motions. Shawn Hempel/Shutterstock

A review comparing the effect of psyllium to wheat bran in people with chronic constipation found psyllium was 3.4 times more effective at increasing the amount of stool passed.

This is important because having a bigger bowel motion waiting in the colon to be passed sends signals to your gut that it’s time to expel the stool – and it helps the gut contract to do just that.

The review found both psyllium and coarse wheat bran had a stool-softening effect, but finely ground wheat bran had a stool-hardening effect.

Other foods rich in fermentable carbohydrates include dark rye bread and legumes (chickpeas, lentils, four-bean mix, red kidney beans, baked beans); while wholemeal and wholegrain breads and cereals are high in different types of dietary fibres.

Read more: Multigrain, wholegrain, wholemeal: what's the difference and which bread is best?

2. Kiwi fruit

Kiwi fruit fibre absorbs about three times its weight in water. This means it helps make stools softer and boosts volume by increasing the amount of water retained in bowel motions. This stimulates the gut to contract and moves the bowel motions along the gut to the anus.

In a study of 38 healthy older adults, researchers found adding two to three kiwi fruit per day to their diets for three weeks resulted in participants passing bowel motions more often. It also increased the size of their stools and made them softer and easier to pass.

Had constipation? Here are 4 things to help treat it Kiwi fruit can help you go to the loo more regularly. Nitr/Shutterstock

Kiwi fruit are also rich in the complex carbohydrate inulin a type of fructan. Fructans are a prebiotic fibre, meaning they encourage growth of healthy bacteria in the colon.

But fructans can also aggravate symptoms in some people with irritable bowel syndrome (IBS). If you have IBS and constipation, check in with your GP before upping your fructan intake.

Read more: Explainer: what is irritable bowel syndrome and what can I do about it?

If you don’t like kiwi fruit, other vegetables and fruit high in fructans include spring onion, artichoke, shallots, leek, onion (brown, white and Spanish), beetroot, Brussels sprouts, white peaches, watermelon, honeydew melon and nectarines.

3. Prunes

Prunes are dried plums. They contain a large amount of sorbitol, a complex carbohydrate that passes undigested into the colon where bacteria ferment it. This produces gas and water, which triggers an increase in bowel movements.

Eating prunes is even more effective than psyllium in improving stool frequency and consistency.

One study of adults with constipation compared eating 100 grams (about ten) prunes a day for three weeks to those who ate psyllium. The prune group passed an average of 3.5 separate bowel motions per week compared to 2.8 in the psyllium group.

The prune group’s stools were also softer. They rated, on average, 3.2 on the Bristol stool chart compared to 2.8 for the psyllium group, meaning their bowel motions were more toward smooth to cracked sausage-shaped motions rather than lumpy ones.

Had constipation? Here are 4 things to help treat it The Conversation, CC BY-ND If you don’t like prunes, other foods that contain sorbitol include apples, pears, cherries, apricots, plums and “sugar-free” chewing gum and “sugar-free” lollies. 4. Water Not drinking enough water is the strongest predictor of constipation. When your body is a bit dehydrated, there’s less water for the fibre in your colon to absorb, meaning your bowel motions also become dehydrated and harder to pass. Aim for around 1.5 to two litres of fluid per day, which can include liquids such as tea, coffee, soup, juice, and even jelly and the liquid from stewed fruit. Read more: Health Check: what your pee and poo colour says about your health Putting it all together Start by increasing the amount of water or other liquids you drink. You should be drinking enough that your urine is the colour of straw. Had constipation? Here are 4 things to help treat it Aim for two litres of water a day. Pixel-Shot/Shutterstock Next, add in psyllium. Start with a tablespoon once a day with breakfast cereal. Psyllium forms a gel as soon as it comes into contact with liquids so to make psyllium more palatable, mix it with a small amount of stewed fruit or yoghurt and eat it straight away. If needed, increase psyllium to twice a day. At least once a day, have some prunes (either dried or canned) or kiwi fruit and a variety of other foods high in fibre, fructans, sorbitol and fermentable carbohydrate. If your bowel habits don’t improve, see your GP.

Authors: Clare Collins, Professor in Nutrition and Dietetics, University of Newcastle

Read more https://theconversation.com/had-constipation-here-are-4-things-to-help-treat-it-123364

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