Dietitians and other healthcare professionals can often be heard talking about how we should eat more fibre. You may understand that it is “good for you” to have fibre in your diet. But have you ever thought about why?
This post explains the different types of fibre, looks at some of its benefits and suggests how you can include more of it in your diet.
Types of fibre
An easy way to remember foods that contain fibre is that they all come from plants. Meat, fish and dairy foods do not contain fibre.
Fibre can be split into two different types, soluble and insoluble. Both have different health benefits, so we should try to include both types in our diets.
- Soluble fibre
As the name suggests, soluble fibre dissolves in water. In the gut, this helps soften your stools. Consequently, if you suffer from constipation, gradually increasing your intake of soluble fibre can help make it easier to go. Soluble fibre can also help lower cholesterol levels.
Foods such as oats, pulses, lentils, golden linseeds, potatoes and vegetables are all good sources of soluble fibre. - Insoluble fibre
Insoluble fibre cannot be digested, instead it is used as a ‘food’ source for good bacteria we have in the gut, helping keep our gut healthy. Insoluble fibre also acts as a sponge, helping keep us fuller for longer and move food through our digestive system.
Good sources of insoluble fibre include; bran, wholegrain and wholemeal foods, skins of fruits and vegetables and nuts and seeds.
To help differentiate between the two different types, think about making porridge (or oatmeal) on the stove, the oats ‘dissolve’ into the liquid. When cooking brown rice, the rice does not dissolve, but rather absorbs the water and goes soft. This is because the oats are high in soluble fibre, whilst brown rice is high in insoluble fibre.
Benefits
As fibre can help you feel full for longer, it can be a useful tool when trying to manage your weight. It can also help control your blood glucose and cholesterol levels. Having a diet high in fibre can also reduce your risk of cardiovascular disease, type 2 diabetes and bowel cancer.
How much?
According to EFSA (European Food Safety Authority) adults should be aiming for around 25g of fibre per day. The British Guidelines recommend 30g a day. Most people aren’t eating enough. On average, people manage to eat around 14g of fibre per day.
Increase your fibre intake
If you want to increase your intake of fibre, it is important that you do so gradually. Increasing your intake too rapidly can result in stomach cramps and leave you feeling bloated. You should also make sure you drink plenty of water, aim for 6-8 glasses per day.
You can increase the amount of fibre in your diet by ensuring your diet contains plenty of fruit and vegetables, opting for wholegrains (brown rice/bread/pasta over white), leaving the skin on potatoes and adding beans or lentils to your soups and salads. Ensuring a vegetarian meal once per week is a great way of upping your fibre intake #meatfreemonday!
What does 30g a day look like?
IBS
People who have digestive problems or IBS (irritable bowel syndrome) may need to adjust the type and amount of fibre they have in their diets depending on their symptoms. This is something that needs to be assessed on an individual basis. You should see your doctor or dietitian for more advice regarding this.
More information
Fibre-rich foods
General information on fibre from patient.co.uk
NHS information on constipation
NHS information on diarrhoea
NHS information on IBS
Jen Credicott | Dietitian 