Tips for a healthy gut: what helps, what does not and when to see a doctor

This is general information from published health sources and is not a substitute for medical advice.

Gut health is a popular topic, and many products promise a "reset" or a "cleanse". The evidence is more modest. This guide covers what health bodies actually support: fibre-rich Indian food, safe water and hygiene, realistic expectations of curd and probiotics, and the symptoms that need a doctor. It does not diagnose any condition.

What a gut-friendly plate looks like

The Dietary Guidelines for Indians 2024 from ICMR-NIN build on variety. They advise eating a combination of whole grains, pulses and millets, plenty of fresh, locally available vegetables, and fruit. In practice:

• aim for at least 400 g of vegetables a day, including green leafy vegetables in every meal;
• eat plenty of legumes such as dal, rajma, chana and peas, which are good sources of protein and fibre;
• choose whole wheat, ragi, bajra, jowar and other millets, and nuts and seeds, more often than refined grains;
• eat fruit whole rather than as juice;
• eat more sprouted or fermented foods, and cook by pressure cooking or steaming rather than deep frying.

Add fibre gradually, and drink fluids as you do. The NHS advises building up fibre gradually when you are constipated. If bloating stays troublesome, speak to a doctor rather than cutting out whole food groups.

Fermented foods and probiotics: realistic expectations

The US National Center for Complementary and Integrative Health (NCCIH) defines probiotics as live microorganisms intended to have health benefits. They are found in yogurt and other fermented foods and in supplements. The evidence is mixed:

• Taking probiotics with antibiotics was linked with roughly half the chance of antibiotic-associated diarrhoea in a 2017 review, but NCCIH calls this tentative.
• For irritable bowel syndrome (IBS), a 2018 review of 53 studies suggested probiotics may help overall symptoms and abdominal pain, but could not draw definite conclusions.
• A Cochrane review of 82 studies (12,127 people, mostly children) found that probiotics probably make little or no difference to the number of people whose sudden infectious diarrhoea lasts 48 hours or longer.

Curd, chaas and other fermented foods can be part of a good diet, and ICMR-NIN recommends milk or curd for children and as a protein source for vegetarians. But we cannot say that a bowl of curd treats any gut condition, because NCCIH says it is uncertain which probiotic strains and doses work best.

Foods that are cooked after fermenting, such as idli, dosa and dhokla, are unlikely to contain live bacteria by the time you eat them, though they can still be part of a varied diet.

Take care with supplements. NCCIH says some products have been found to contain microorganisms other than those listed on the label. People with weak immune systems or serious illness, and premature infants, face a greater risk of harm from probiotics, so they should talk to a doctor before using them.

From our guides

The weekly shortlistOne email a week: festival deadlines and the guides worth your time.Subscribe free

Water, hygiene and food safety

Infection is a common and preventable threat to your gut. The WHO says diarrhoea is usually a symptom of an intestinal infection, which spreads through contaminated food or water or through poor hygiene. Safe drinking water, sanitation and handwashing with soap reduce the risk. ICMR-NIN gives practical steps:

• wash your hands with soap and water before touching food, utensils or cooking;
• wash vegetables and fruit before use, and cook meat thoroughly;
• store raw and cooked food separately, and refrigerate perishable food;
• eat cooked food within 4 to 6 hours, and reheat it thoroughly if it was left at room temperature;
• drink adequate safe water, and boil water if its safety is in doubt;
• in hot weather, prefer buttermilk, tender coconut water or lemon water over soft drinks.

If you or your child gets loose motions, the WHO says oral rehydration solution (ORS), made from clean water, sugar and salt, replaces lost fluids, and zinc supplements shorten the illness in children. Children should keep eating and be breastfed if they are babies. Use packaged ORS exactly as its directions say, and ask a doctor about zinc.

Constipation, bloating and stress

For constipation, the NHS suggests gradually increasing fibre, drinking plenty of water and other fluids, and avoiding alcohol. A daily walk can help you go more regularly. Keep to a regular time and place for the toilet, do not delay when you feel the urge, and try resting your feet on a low stool with your knees above your hips.

A pharmacist can suggest a laxative if lifestyle changes are not enough, and the NHS says to use these for a short time only.

IBS causes cramps, bloating, diarrhoea or constipation that come and go. The NHS lists common triggers as alcohol, caffeine, certain rich foods, stress and regular antibiotic use. Stress is one trigger, so it can help to look at sleep, activity and relaxation as well as food.

Foods and habits to limit

ICMR-NIN advises minimising high-fat, high-sugar, high-salt and ultra-processed foods, including sauces, mayonnaise, biscuits, cakes, pastries, breakfast cereals, packaged juices, cool drinks and health drinks. It also says to restrict added salt to a maximum of 5 g a day, to avoid deep-fried, fatty, sugary and salty foods, and to avoid alcohol. It points out that even home-made food can be unhealthy if it is high in fat, sugar or salt.

Myths to drop

• "You must go vegetarian for a healthy gut." ICMR-NIN says vegetarians and non-vegetarians can both meet their protein needs, and its advice rests on variety, vegetables, pulses and whole grains.
• "Imported fermented foods are essential." ICMR-NIN advises fresh, locally available, seasonal foods. You do not need miso or kefir.
• "A probiotic fixes every stomach upset." As shown above, the evidence is mixed and strain-specific.
• "A cleanse resets your gut." We found no health body recommending one. Fibre, safe water, movement and regular meals do the work.

When to see a doctor

See a doctor if cramps, bloating, diarrhoea or constipation have lasted for more than 4 weeks. Ask for an urgent appointment, or go to a hospital emergency department, if you have:

• weight loss for no reason;
• bleeding from the bottom or bloody diarrhoea;
• a hard lump or swelling in your tummy;
• shortness of breath, noticeable heartbeats and unusually pale skin, which may point to a more serious problem;
• diarrhoea that lasts 14 days or longer, or signs of dehydration such as extreme drowsiness, sunken eyes, being unable to drink, or skin that stays pinched for 2 seconds or more (the WHO lists these).

Seek urgent care for babies and young children with any signs of dehydration. Blood in your stool always needs checking, even if you think it is piles.

Related guides: 10 everyday Indian foods that fit a heart-friendly diet, 10 simple ways to ease everyday stress, and when to get help, 5 gentle desk-break exercises for back and neck aches at work.

Frequently asked questions

Sources

• ICMR-NIN, "Dietary Guidelines for Indians 2024" (booklet): https://www.nin.res.in/downloads/DGI_Booklet_English_CMYK.pdf. Read on 13 October 2026.
• NHS, "Constipation": https://www.nhs.uk/conditions/constipation/. Read on 13 October 2026.
• NHS, "Irritable bowel syndrome (IBS): symptoms": https://www.nhs.uk/conditions/irritable-bowel-syndrome-ibs/symptoms/. Read on 13 October 2026.
• Cochrane, "Probiotics for treating acute infectious diarrhoea" (2020 update): https://www.cochrane.org/evidence/CD003048_probiotics-treating-acute-infectious-diarrhoea. Read on 13 October 2026.
• US National Center for Complementary and Integrative Health, "Probiotics: usefulness and safety": https://www.nccih.nih.gov/health/probiotics-usefulness-and-safety. Read on 13 October 2026.
• World Health Organization, "Diarrhoeal disease" fact sheet (dated 7 March 2024): https://www.who.int/news-room/fact-sheets/detail/diarrhoeal-disease. Read on 13 October 2026.