Know2eat

Wheat bran

Triticum aestivum

What wheat bran has been studied for

3 associations assessed — 2 with at least some human evidence behind them. Strongest first.

  • 1 Strong
  • 1 Limited
  • 1 Insufficient
4 things to know first — allergies, interactions and intake limits

About wheat bran

The outer layers of the wheat kernel, separated during milling of white flour. Almost half its weight is insoluble fibre, which makes it one of the most concentrated fibre sources in the food supply. The USDA reference entry is for crude bran, which is eaten by the spoonful rather than the bowl.

Also known as Miller's bran, Unprocessed bran

Gut & Digestive HealthBlood Sugar & Metabolic HealthHeart Health

The evidence in depth

Best supported: Strong

What each association actually rests on, and the papers behind it. A rating describes the state of the research, not how impressive the food is. How we rate evidence.

Bowel regularity

Gut & Digestive Health
Strong evidence

Wheat bran is the best-evidenced food for increasing stool weight and shortening transit time, with a large and consistent body of human trials behind it and a dose-response relationship that has been quantified across studies. Whether it relieves the symptoms people call constipation is a narrower and less consistent finding than the stool-weight data.

What may be going on: Coarse insoluble fibre resists fermentation, holds water in the stool and mechanically stimulates the colon wall, increasing stool mass and propulsion.

Strong evidence. Consistent findings across multiple good-quality human studies.

3 sources

Deep research mode adds each paper’s own conclusion and stated limitations.

Blood glucose response

Blood Sugar & Metabolic Health
Limited evidence

Evidence is limited and largely negative for acute effects. Insoluble fibre does not slow starch digestion the way viscous soluble fibre does, and trials adding wheat bran generally report little change in post-meal glucose, even though cereal fibre intake is associated with lower diabetes risk in cohorts.

Limited evidence. Early human work, or mostly lab and animal research.

2 sources

Deep research mode adds each paper’s own conclusion and stated limitations.

Blood lipid profile

Heart Health
Insufficient evidence

There is no dependable evidence that wheat bran lowers cholesterol. Trials comparing it with oat bran consistently find that the insoluble fibre of wheat does not produce the LDL reduction that viscous oat beta-glucan does.

Insufficient evidence. Not enough human research to say anything useful yet.

No source is attached to this association yet, so it is rated insufficient by default. It is listed because people commonly ask about it — not because there is evidence for it.

Ask about Wheat bran

Ask about Wheat bran

Answers are written only from the entries on this page — the same nutrients, compounds, claims and citations you can read above. Nothing is added from outside the database, and every answer lists what it was built from.

AI explanations are not switched on for this site, so there is nothing to ask here. Everything above is read straight from the database and does not need them.

Key nutrients

Nutrient content per 100 grams
NutrientAmount% DV
Macronutrients
Calories216 kcal11%
Protein15.6 g31%
Total fat4.25 g5%
Carbohydrate64.5 g23%
Fibre42.8 g153%
Total sugars0.41 g—
Water9.89 g—
Fats
Saturated fat0.63 g3%
Monounsaturated fat0.637 g—
Polyunsaturated fat2.21 g—
Cholesterol0 mg0%
EPA (omega-3)0 g—
DHA (omega-3)0 g—
DPA (omega-3)0 g—
Linoleic acid (omega-6)2.04 g—
Vitamins
Vitamin A0 µg0%
Vitamin C0 mg0%
Vitamin D0 µg0%
Vitamin E1.49 mg10%
Vitamin K1.9 µg2%
Thiamin (B1)0.523 mg44%
Riboflavin (B2)0.577 mg44%
Niacin (B3)13.6 mg85%
Pantothenic acid (B5)2.18 mg44%
Vitamin B61.3 mg77%
Folate79 µg20%
Vitamin B120 µg0%
Choline74.4 mg14%
Minerals
Calcium73 mg6%
Iron10.6 mg59%
Magnesium611 mg145%
Phosphorus1013 mg81%
Potassium1182 mg25%
Sodium2 mg0%
Zinc7.27 mg66%
Copper0.998 mg111%
Manganese11.5 mg500%
Selenium77.6 µg141%
Other measured compounds
Beta-carotene6 µg—
Alpha-carotene0 µg—
Lycopene0 µg—
Lutein + zeaxanthin240 µg—
Caffeine0 mg—
Ash5.79 g—

Nutrient values are per 100 g of the USDA reference entry named on this page and vary with variety, growing conditions, storage and preparation.

Source record: Wheat bran, crude (USDA FoodData Central, FDC ID 169722).

% DV uses the FDA Daily Values for adults and children aged 4 and over. A dash means no Daily Value has been established for that nutrient.

Bioactive compounds

Compounds present in meaningful amounts. Presence is banded rather than quantified, because whole-food levels vary enormously with variety, growing conditions, storage and preparation.

How preparation changes things

Only effects with real support are listed. If a preparation method is missing, it is because nothing dependable is documented — not because it makes no difference.

Nothing dependable is recorded about how preparation changes this food’s nutritional properties. Rather than guess, this section stays empty.

Things to know

Allergies, interactions and intake concerns. Every food gets this section — a reference where everything is uniformly good is not a reference.

  • Avoid

    Wheat bran contains gluten

    Bran is a fraction of the wheat kernel and carries gluten with it. It is unsafe in coeliac disease and wheat allergy.

  • Worth knowing

    Can worsen symptoms in IBS

    Wheat bran has a long history of being recommended for irritable bowel syndrome and a substantial body of evidence that it often makes symptoms worse rather than better, through both fructan content and mechanical irritation. Current guidance generally steers people with IBS towards soluble fibres such as ispaghula instead.

  • Worth knowing

    Phytate and mineral absorption

    Bran is the most phytate-dense part of the grain and measurably lowers absorption of iron, zinc and calcium from the meal it is eaten with. Adding several spoonfuls to every meal is a real consideration for anyone with marginal iron or zinc status.

  • Worth knowing

    Needs fluid, and can obstruct

    Concentrated insoluble fibre taken without enough fluid can cause bloating, cramping and, in people with strictures or impaired gut motility, bowel obstruction. Increase the amount gradually and drink to match.