In recent years there has been increasing research into the digestive tract and the many ways in which it interacts with our body and brain. To have good gut health means that your gastrointestinial tract (oesophagus, stomach and intestines) is in the best possible. condition. This involves the gut microbiome - the microbes- a mixture of bacteria, viruses and fungi that live in our digestive system. They are important for good health and disease prevention and the higher level of good microbes (probiotics) in our biome the better.
What are the symptoms of poor gut health?
If your gut health is not optimal you may experience abdominal pain, discomfort, constipation, diarrhoea, heartburn or indigestion. Even if you have no symptoms it remains important to look after your gut as increasingly scientists are finding that gut health is a major factor in our immunity. Good gut health can also protect against type 2 diabetes, bowel cancer and heart disease.
Poor gut health can also have an effect on mood and mental wellbeing- due to the gut-brain axis. This is a two way communication network between the brain and the gut, linked by nerves, hormones and neurotransmitters acting as chemical messengers.
How can I improve my gut health?
Increase your fibre intake - we should consume 30g of fibre a day
Most people only manage about 18g of fibre a day. Eating a combination of soluble and insoluble fibre adds bulk and improves the transit time of food through the digestive system. Gut bacteria loves fibre, but it is recommended to increase your fibre intake gradually to avoid bloating. By eating a variety of fruit, vegetable, pulses, wholegrains and nuts your gut health will improve.
Sources of soluble fibre - oats, linseeds/flaxseeds, lentils, fruit and vegetables.
Sources of insoluble fibre - nuts, wholewheat flour, wholemeal bread, wheat bran, beans,cauliflower, green beans and potatoes
Seven great foods for your microbiome
Apples
are high in pectin a prebiotic - one apple contains 4g of fibre
Oats are high in a dietary fibre called beta-glucan which can help lower LDL cholesterol if eaten regularly
Onions are a good source of prebiotics
Kefir is rich in probiotic bacteria and calcium. It can help restore your gut after you have taken antibiotics which can reduce good gut bacteria
Wholegrain carbohydrates
such as wholemeal bread and pasta and brown rice can easily increase your fibre
Lentils are full of soluble fibre which helps food transit through the digestive system
Fermented foods such as sauerkraut kimchi
may improve intestinal health and as a result support the immune system and anti-inflammatory responses and improve levels of good bacteria in the gut.
Drinking plenty of fluids is great for gut health. 6-8 200ml glasses of water a day is recommended.
Professor Tim Spector, specialist in genetic epidemiology, writes in his book Spoon-Fed how artificial sweeteners and processed foods are bad for our gut health. He advises avoiding anything labelled as a “diet” food and especially anything containing artificial sweeteners which, he suggests, can trick our bodies into gaining weight.
Regular exercise
30 minutes of moderate activity ( moderate = going for a walk at a good pace but still being able to chat) five times a week
helps regulate bowel movements and can help boost gut bacteria.
Calcium
can boost the production of digestive enzymes which break down proteins, carbs and fats and helps the absorption of nutrients - so a small 30g snack of cheese, 120g yogurt or kefir for breakfast or 200ml of milk will help.
Should I take prebiotics and probiotics?
Prebiotics are non-digestible food compounds like fibre that feed the good bacteria and help digestion and nutrient absorption. You do not need to buy them in a pill - you can get them from wholegrains and fruit and vegetables such as asparagus, Jerusalem artichokes, onions, garlic and under-ripe bananas.
Probiotics are the good bacteria themselves such as Lactobacillus and Bifidobacterium species. If your yogurt is live they will be listed in the ingredients list. They are also found in fermented foods such as kimchi, kombucha, tempeh, kefir and sauerkraut (not all sauerkraut has live bacteria as some brands are pasteurised).
To boost gut bacteria we should eat both prebiotics and probiotics, whilst avoiding highly processed foods. Professor Tim Spector advises avoiding any food that comes in a packet with more than 10 ingredients listed.