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A happier gut starts with fibre and a bowl of dahi.

Most urban Indians eat a quarter of the vegetables their gut needs. Whole dals, rotis, guava and a bowl of dahi close the gap, slowly.

5 min read · Updated

A young woman pours chaas into a steel glass beside a plate of idlis with sambar, chutney and a bowl of curd.

The short version

  1. 1

    Aim for at least 25 g of fibre a day. In big studies, the benefit was greatest at 25–29 g.1,2

  2. 2

    Urban Indians eat about 94 g of vegetables and 55 g of fruit a day, against the 400 g and 100 g on ICMR-NIN’s plate.12,13

  3. 3

    Dahi and chaas carry live cultures. Achaar in brine or vinegar isn’t fermented, and it’s salty.8,11

The list

Where the fibre is

Sort by serving or by 100 g, and filter by kind. Dals and grains are dry weights: 30 g dry is about a katori once cooked.

SortShow
Food and servingFibre per servingPer 100 g
Guava14100 g8.6 g8.6 g
Drumstick (moringa) leaves14100 g8.2 g8.2 graw
Amla14100 g7.8 g7.8 g
Kala chana1430 g dry7.6 g25 gdry
Atta, as 2 rotis1460 g atta6.8 g11 gflour
Green peas14100 g fresh6.3 g6.3 gfresh
Pear151 medium, 178 g5.5 g3.1 g
Whole moong1430 g dry5.1 g17 gdry
Rajma1430 g dry5 g17 gdry
Whole masoor1430 g dry5 g17 gdry
Methi leaves14100 g4.9 g4.9 graw
Barley (jau)1430 g dry4.7 g16 gdry
Apple, with skin141 medium, 182 g4.7 g2.6 g
Chana dal1430 g dry4.5 g15 gdry
Bhindi14100 g4.1 g4.1 graw
Bajra1430 g dry3.4 g12 gdry
Ragi1430 g dry3.4 g11 gdry
Chia seeds151 tbsp, 10 g3.4 g34 g
Brown rice151 cup cooked3.2 g1.6 gcooked
Masoor dal (split)1430 g dry3.1 g10 gdry
Jowar1430 g dry3.1 g10 gdry
Papaya14100 g2.8 g2.8 g
Oats15⅓ cup dry, 27 g2.7 g10 gdry
Toor dal1430 g dry2.7 g9.1 gdry
Banana141 medium, 118 g2.3 g1.9 g
Flaxseed (alsi)141 tbsp ground, 7 g1.8 g26 g
Maida1430 g0.8 g2.8 gflour
White rice151 cup cooked0.6 g0.4 gcooked
Total dietary fibre. ICMR-NIN’s Indian Food Composition Tables 2017 where the food is listed, and USDA’s tables otherwise. Indian varieties can run higher: IFCT’s kala chana has about twice USDA’s fibre.14,15

Your day

A 26 g day from an ordinary Indian menu

2 rotis (60 g atta)
6.8 g
A katori of rajma (30 g dry)
5.0 g
One guava (100 g)
8.6 g
Bhindi sabzi (100 g)
4.1 g
A spoon of ground alsi
1.8 g

That’s about 26.3 g, above WHO’s 25 g, without a single packaged “high-fibre” food.1,14

Easy swaps

Small switches, more fibre

  • MaidaAtta

    0.8 g of fibre per 30 g becomes 3.4 g.14

  • White riceBrown rice, or half and half

    0.6 g per cooked cup becomes 3.2 g.15

  • Split masoor dalWhole masoor

    3.1 g per 30 g becomes 5.0 g: removing the husk takes away fibre.14

  • Fruit juiceThe whole fruit

    ICMR-NIN’s plate says to avoid juices; WHO counts only naturally occurring fibre.1,12

Fermented foods

Which ones carry live cultures?

Dahi, lassi and chaas
Set from live curd, they carry live lactic cultures, unless they’re heated. Yoghurt and cultured milks have more human trials than any other fermented food.8
Idli, dosa and dhokla
Fermenting the batter makes them easier to digest and adds B vitamins and vitamin C. Cooking likely kills the microbes, so pair them with dahi or chaas.8,11
Kanji
A traditional fermented black-carrot drink. Its benefits come from lab studies so far, and it needs clean handling: uncontrolled fermentation can let germs in.16
Achaar
Pickles made in brine or vinegar aren’t fermented, and pickles and papad push up your salt. ICMR-NIN’s 2024 limit is 5 g of salt a day.8,11,17
Bread and baked foods
Fermented, but baking kills the microbes.8

Prebiotic fibres feed your gut bacteria. Inulin is found in onion, garlic, wheat, oats and soybeans; beta-glucan in oats and barley.10 In a small 17-week trial, a diet high in fermented foods raised the variety of gut microbes and lowered markers of inflammation.9

Go slowly

Four weeks to more fibre

Add fibre a little at a time, and drink more water as you do.

  1. Week 1

    Atta, not maida

    And one whole fruit a day: guava, apple, pear or papaya.

  2. Week 2

    One whole dal

    Switch one split dal to sabut moong, rajma or kala chana.

  3. Week 3

    Vegetables twice

    A sabzi you like at two meals: bhindi, peas or methi.

  4. Week 4

    A spoon of seeds

    Ground alsi or oats, plenty of water, and a daily walk.3,5

Myths

What you might hear

  • They say

    “All fermented foods are probiotic.”

    Actually

    “Probiotic” means defined live strains with a proven benefit. Most fermented foods don’t meet that bar, and baked or heated ones have no live microbes.7,8

  • They say

    “Achaar is good for the gut.”

    Actually

    Pickles in brine or vinegar aren’t fermented, and they add a lot of salt.8,11

  • They say

    “Lots of fibre at once will fix constipation fast.”

    Actually

    Add it gradually, with fluids, or expect gas and bloating.3,5

  • They say

    “You need probiotic capsules for a healthy gut.”

    Actually

    Probiotic effects depend on the exact strain. The strongest food evidence is for plain yoghurt and cultured milk.7,8

  • They say

    “More fibre changes your gut bacteria in days.”

    Actually

    In a 17-week trial, fibre didn’t raise microbe variety, though it changed what the microbes do. Fibre’s long-term benefits come from large studies.2,9

See a doctor if

  • Your poo changes in a way that isn’t usual for you, or you go more or less often, and it lasts.
  • You see blood in your poo, which may look red or black, or you bleed from your bottom.
  • You have tummy pain, a lump, bloating, or you lose weight without trying.
  • Constipation comes with constant pain, vomiting, fever, lower-back pain or not being able to pass gas.
  • You are constipated and tired all the time, or nothing has helped.

Black or dark-red poo or bloody diarrhoea needs an urgent appointment. Non-stop bleeding or large clots need emergency care.

A family history of bowel cancer is a reason to see a doctor sooner.4,5,6

Questions

Questions people ask

Pet saaf nahi hota, roz kya khaun?

Build up fibre slowly: whole dals, atta rotis, guava, bhindi, and a spoon of alsi or oats. Drink plenty of water and walk every day. If it lasts, or comes with blood or weight loss, see a doctor.

How much fibre do I need a day?

At least 25 g, says WHO. US guidance gives 22–34 g depending on age and sex.

Is curd a probiotic?

Curd with live cultures is a fermented food, and yoghurt has more trial evidence than any other fermented food. Strictly, “probiotic” means defined live strains with a proven benefit.

Which Indian foods are prebiotic?

Onion, garlic, wheat (atta), oats and soybeans contain inulin, and oats and barley contain beta-glucan.

Are idli and dosa good for gut health?

Fermenting the batter makes them easier to digest and adds B vitamins and vitamin C. Once cooked they likely carry few live microbes, so have them with dahi or chaas.

When is constipation serious?

When it comes with blood, black stools, constant pain, vomiting, fever or weight loss you can’t explain, or when a change in your bowel habit lasts.

Sources

  1. 1.WHO: WHO updates guidelines on fats and carbohydrates, 2023.
  2. 2.Reynolds A et al. Carbohydrate quality and human health: systematic reviews and meta-analyses. Lancet, 2019.
  3. 3.NIDDK: Eating, diet and nutrition for constipation.
  4. 4.NIDDK: Symptoms and causes of constipation.
  5. 5.NHS: Constipation.
  6. 6.NHS: Bowel cancer symptoms.
  7. 7.Hill C et al. The ISAPP consensus statement on the term probiotic. Nat Rev Gastroenterol Hepatol, 2014.
  8. 8.Marco ML et al. The ISAPP consensus statement on fermented foods. Nat Rev Gastroenterol Hepatol, 2021.
  9. 9.Wastyk HC et al. Gut-microbiota-targeted diets modulate human immune status. Cell, 2021.
  10. 10.Carlson JL et al. Health effects and sources of prebiotic dietary fiber. Curr Dev Nutr, 2018.
  11. 11.NIN. Dietary Guidelines for Indians: A Manual, 2011.
  12. 12.ICMR-NIN. My Plate for the Day.
  13. 13.Hemalatha R et al. What India Eats. ICMR-NIN, 2023.
  14. 14.Longvah T et al. Indian Food Composition Tables 2017. ICMR-NIN.
  15. 15.USDA Agricultural Research Service. FoodData Central (SR Legacy).
  16. 16.Kaur P et al. Processing technique for a ready-to-use lab-fermented kanji mix. Sci Rep, 2023.
  17. 17.Shah RM et al. Dietary guidelines across countries and the Dietary Guidelines for Indians, 2024. Indian J Med Res, 2025.

Swastya shares health education, not medical advice. Lab ranges vary by lab, age and condition, so read your numbers with your doctor, and see a doctor promptly for any symptom that worries you.

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