Food & nutrition
Legumes and beans
On this page
Legumes are a plant family; beans, peas, lentils, chickpeas, soybeans and peanuts belong to it. Pulses are the subgroup grown for their mature, dried edible seeds, excluding crops grown primarily for oil. Lentils, dried peas and chickpeas are pulses; fresh green beans, soybeans and peanuts are legumes with different uses. The words overlap in everyday conversation, but they do not describe identical foods.[1]
What you might buy
| Form | What it means in the kitchen |
|---|---|
| Whole dried pulses | Dried chickpeas, beans, lentils or peas need cooking. Lentils and split peas generally do not need the soaking used for many larger dried pulses.[3] |
| Canned pulses | Already cooked and convenient for soups, salads and curries. Canned kidney beans have received the heat treatment needed to deactivate their problematic lectins.[4] |
| Fresh legumes | Green beans and fresh peas are harvested as vegetables rather than dry pulses. Soybeans and peanuts also belong to the wider legume family.[1] |
Protein, carbohydrate and fibre in one food
Beans and lentils provide protein together with carbohydrate and fibre. They also contribute nutrients such as folate, iron, potassium and magnesium. Calling them a protein food does not make them carbohydrate-free; calling them a starchy food does not erase their protein. Their place in a meal can differ from that of meat, a refined grain or a green vegetable.[2]
A bean chilli, lentil soup and chickpea hummus are familiar ways to use pulses. Their ingredient lists still differ: the seed is one component of a finished dish. Hummus contains other ingredients, and a bean dish can include a sauce or meat. “Contains beans” therefore describes an ingredient rather than an entire nutritional profile.[3]
Preparation changes convenience and safety
Sort dried pulses for small stones and rinse before cooking. Follow the preparation method for the particular seed: split peas and lentils differ from whole chickpeas. Acidic ingredients such as tomatoes can slow softening, so preparation guides may add them later. Cooked pulses also need ordinary leftover handling; a dry, shelf-stable seed does not remain shelf-stable once it is cooked and moist.[3]
For canned products, distinguish the beans from the packing liquid. A 2011 laboratory study measured sodium in several brands of five bean varieties before and after draining or draining plus rinsing. The retrieved original summary establishes the comparison, but does not provide a verified universal percentage reduction. This page therefore avoids promising that rinsing removes a fixed fraction of sodium from every can.[7]
Evidence & uncertainty
There is evidence that eating pulses can modestly improve LDL cholesterol in controlled diets. That is a measured risk factor, not proof that a particular bean prevents a heart attack. Studies compare specific diets over specific periods; their results should not become a guarantee for every product or every person.[5]
Selected-source overview · Independent review pendingPublished questions
What exactly is a legume?
Selected-source overview · Independent review pending. Read the evidence context.
It is a member of a botanical family, rather than a single food or nutrient category. Familiar edible examples include chickpeas, lentils, beans, peas, soybeans and peanuts. Some members are grown for oil; others for fresh vegetables or dried seeds. The family name alone does not tell you how the food is prepared.[1]
Evidence behind this answer
- What is the difference between legumes and pulses?
agency condition or prevention explanation · 2025
Selected relevant original official page passages inspected · 4 February 2025; family, pulse criteria, examples and meal uses
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Are beans, legumes and pulses the same thing?
Selected-source overview · Independent review pending. Read the evidence context.
Not quite. Pulses are legumes harvested for their dry edible seeds, including dry beans, lentils, chickpeas and dry peas. Fresh green beans are legumes but are not dry pulses. Soybeans and peanuts are also legumes, but FAO excludes the oil-bearing crops from its pulse category.[1]
Evidence behind this answer
- What is the difference between legumes and pulses?
agency condition or prevention explanation · 2025
Selected relevant original official page passages inspected · 4 February 2025; family, pulse criteria, examples and meal uses
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Are canned beans a reasonable alternative to dried beans?
Selected-source overview · Independent review pending. Read the evidence context.
Yes: they offer a cooked form that saves preparation time. Canned kidney beans have already undergone sufficient heat treatment for lectin safety. Compare products as foods with their actual ingredients and liquid, rather than assuming that canned means raw beans with preservatives. Dried kidney beans require their own proper preparation.[4]
Evidence behind this answer
- Lectins in Dry Legumes
agency condition or prevention explanation · 2017
Selected relevant original official page passages inspected · 4 May 2017; The Issue, What Can You Do?, and dry red kidney bean preparation; current posted page rechecked
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Do beans count as protein, or as carbohydrates?
Selected-source overview · Independent review pending. Read the evidence context.
They supply both, as well as fibre. That combination is why beans, peas and lentils can serve as a plant protein source while also contributing to the vegetable side of a dietary pattern. They are not nutritionally interchangeable with either a plain piece of meat or a serving of refined starch.[2]
Evidence behind this answer
- Beans, Peas, and Lentils: Health Benefits (FSHN13-06)
agency condition or prevention explanation · Date not stated
Selected relevant original official page passages inspected · Bean Basics; Beans, Peas, Lentils, and Nutrition; article revision date not established from the retrieved HTML
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Why do beans cause gas for some people?
Selected-source overview · Independent review pending. Read the evidence context.
Gut bacteria can ferment carbohydrates in beans that human digestive enzymes do not fully break down. The feeding studies found substantial differences between people and bean types. Many participants reported no increase, and symptoms often eased; persistent discomfort is also possible. Gas alone does not demonstrate an allergy or that beans are toxic.[6]
Evidence behind this answer
- Perceptions of flatulence from bean consumption among adults in 3 feeding studies
clinical intervention study · 2011
Original full abstract and selected full-text methods/results/limitations inspected; no independent full-text appraisal · 21 November 2011; DOI 10.1186/1475-2891-10-128; abstract, fermentation background, results and limitations
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Must every dried pulse be soaked overnight?
Selected-source overview · Independent review pending. Read the evidence context.
No. The NDSU preparation guide distinguishes lentils and split peas, which do not need soaking, from whole chickpeas and whole peas. Use instructions for the food you actually have rather than one rule for the entire family. Soaking is a preparation step; it does not replace the cooking required afterward.[3]
Evidence behind this answer
- Pulses: The Perfect Food (FN1508)
agency condition or prevention explanation · 2022
Selected relevant original official page passages inspected · Reviewed October 2022; Buying and Preparing Pulses, Storing Pulses and specific preparation sections; dietary targets are not adopted here
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Why do dried kidney beans need special care?
Selected-source overview · Independent review pending. Read the evidence context.
Raw or insufficiently cooked red kidney beans can contain high levels of a lectin that causes acute gastrointestinal illness. Health Canada specifies soaking for at least five hours, discarding that water, then vigorously boiling pre-soaked beans for at least ten minutes. Its guidance says a slow cooker alone is unsuitable. Canned kidney beans are already heat-treated.[4]
Evidence behind this answer
- Lectins in Dry Legumes
agency condition or prevention explanation · 2017
Selected relevant original official page passages inspected · 4 May 2017; The Issue, What Can You Do?, and dry red kidney bean preparation; current posted page rechecked
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Can legumes be allergens?
Selected-source overview · Independent review pending. Read the evidence context.
Yes. Peanut, soya and lupin are among the 14 allergens UK businesses must identify when used as ingredients. Check the actual ingredient list and allergen information, including in sauces or flour-based products. A vegan claim does not guarantee absence of an allergen, and precautionary “may contain” wording addresses a different issue from an intentionally added ingredient.[8]
Evidence behind this answer
- Understanding food labelling: Allergen labelling
agency condition or prevention explanation · Date not stated
Selected relevant original official page passages inspected · 14 named allergens; prepacked food; free-from and precautionary labels; UK jurisdiction
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
Do people with diabetes have to avoid beans because they contain carbohydrate?
Selected-source overview · Independent review pending. Read the evidence context.
Carbohydrate content alone does not settle the choice. The legume-focused dietary trial improved average HbA1c versus its wheat-fibre comparison, within ongoing diabetes care. A personal meal plan still depends on the complete diet and treatment.[9]
Evidence behind this answer
- Effect of Legumes as Part of a Low Glycemic Index Diet on Glycemic Control and Cardiovascular Risk Factors in Type 2 Diabetes Mellitus: A Randomized Controlled Trial
randomized dietary trial · 2012
Original abstract and selected original intervention, results and disclosure passages read at publisher after direct PubMed retrieval failed. Three-month dietary advice in treated type 2 diabetes; not a medication-replacement or clinical event trial. · Abstract; diet comparisons; HbA1c; calculated rather than observed coronary risk; disclosures
This answer summarizes selected sources. An independent appraisal of the complete evidence has not been completed.
What the research actually compared
A 2014 systematic review pooled 26 randomized trials involving 1,037 participants. Pulse-containing diets reduced LDL cholesterol by an average of 0.17 mmol/L relative to diets with matched energy but without pulses. Effects on two other lipid targets were not established. The authors called for longer and better-quality trials. This supports a modest dietary effect on LDL; it does not establish lifelong disease prevention or a therapeutic dose for an individual.[5]
Digestion varies too. Three feeding studies of pinto beans, black-eyed peas and baked beans found that some participants reported more gas initially, while many did not. Reports often declined with time, but a minority continued to have symptoms. These were self-reported experiences, not direct measurements of gas or a test of every legume variety.[6]
Having carbohydrate does not mean beans behave like every other starch
A low glycemic index means a smaller measured blood-glucose rise for the same amount of available carbohydrate. A 2012 trial randomized 121 adults with treated type 2 diabetes to a low-glycemic-index diet emphasizing legumes or a high-wheat-fibre diet for three months. HbA1c, a longer-term blood-glucose measure, improved in both groups, with an additional average reduction of 0.2 percentage points in the legume group. The study’s heart-disease result was a calculated risk score, not observed heart attacks. Pulse-industry funding and several author food-industry relationships were disclosed.[9]
A separate 2022 trial in 300 adults compared calorie-restricted DASH diets, a blood-pressure-oriented eating pattern, with and without greater legume emphasis for sixteen weeks. Fasting glucose and an insulin-resistance measure improved more in the legume arm, while both groups improved several markers. This concerns supported dietary replacements in people already diagnosed with diabetes. Neither study establishes that adding unlimited beans to an unchanged diet prevents diabetes or replaces prescribed treatment.[10]
References
- What is the difference between legumes and pulses?
Agency condition or prevention explanation
Food and Agriculture Organization of the United Nations · Content/publication date: 2025
Accessed: 2026-10-10 UTC · Selected relevant original official page passages inspected
Cited sections: 4 February 2025; family, pulse criteria, examples and meal uses - Beans, Peas, and Lentils: Health Benefits (FSHN13-06)
Agency condition or prevention explanation
Mahan, Foster and Dahl; University of Florida IFAS Extension · Content/publication date: not stated
Accessed: 2026-10-10 UTC · Selected relevant original official page passages inspected
Cited sections: Bean Basics; Beans, Peas, Lentils, and Nutrition; article revision date not established from the retrieved HTML - Pulses: The Perfect Food (FN1508)
Agency condition or prevention explanation
Garden-Robinson; North Dakota State University Extension · Content/publication date: 2022
Accessed: 2026-10-10 UTC · Selected relevant original official page passages inspected
Cited sections: Reviewed October 2022; Buying and Preparing Pulses, Storing Pulses and specific preparation sections; dietary targets are not adopted here - Lectins in Dry Legumes
Agency condition or prevention explanation
Health Canada · Content/publication date: 2017
Accessed: 2026-10-10 UTC · Selected relevant original official page passages inspected
Cited sections: 4 May 2017; The Issue, What Can You Do?, and dry red kidney bean preparation; current posted page rechecked - Effect of dietary pulse intake on established therapeutic lipid targets for cardiovascular risk reduction: a systematic review and meta-analysis of randomized controlled trials
Systematic review
Ha and colleagues · Content/publication date: 2014
Accessed: 2026-10-10 UTC · Canonical journal full text unavailable (403); original abstract read on McMaster author-institution record https://experts.mcmaster.ca/scholarly-works/277053; no independent full-text appraisal
Cited sections: 2014; DOI 10.1503/cmaj.131727; abstract reproduced on author institution record - Perceptions of flatulence from bean consumption among adults in 3 feeding studies
Clinical intervention study
Winham and Hutchins · Content/publication date: 2011
Accessed: 2026-10-10 UTC · Original full abstract and selected full-text methods/results/limitations inspected; no independent full-text appraisal
Cited sections: 21 November 2011; DOI 10.1186/1475-2891-10-128; abstract, fermentation background, results and limitations - Sodium Reduction in Canned Beans After Draining, Rinsing
Food composition study
Duyff, Mount and Jones · Content/publication date: 2011
Accessed: 2026-10-10 UTC · Canonical publisher direct retrieval unavailable; original publisher-indexed methods summary inspected, numerical results and full text not appraised
Cited sections: 9 June 2011; DOI 10.1080/15428052.2011.582405; original indexed abstract description of measured comparisons only - Understanding food labelling: Allergen labelling
Agency condition or prevention explanation
UK Government · Content/publication date: not stated
Accessed: 2026-10-10 UTC · Selected relevant original official page passages inspected
Cited sections: 14 named allergens; prepacked food; free-from and precautionary labels; UK jurisdiction - Effect of Legumes as Part of a Low Glycemic Index Diet on Glycemic Control and Cardiovascular Risk Factors in Type 2 Diabetes Mellitus: A Randomized Controlled Trial
Randomized dietary trial
Jenkins DJA and colleagues · Content/publication date: 2012
Accessed: 2026-10-20 UTC · Original abstract and selected original intervention, results and disclosure passages read at publisher after direct PubMed retrieval failed. Three-month dietary advice in treated type 2 diabetes; not a medication-replacement or clinical event trial.
Cited sections: Abstract; diet comparisons; HbA1c; calculated rather than observed coronary risk; disclosures - Improvement of glycemic indices by a hypocaloric legume-based DASH diet in adults with type 2 diabetes: a randomized controlled trial
Randomized dietary trial
Hosseinpour-Niazi S and colleagues · Content/publication date: 2022
Accessed: 2026-10-20 UTC · Complete original publisher abstract and funding/conflict metadata read. Full methods/results remained subscription content. Both arms used calorie-restricted DASH patterns; numerical effects and a detailed intervention recipe are not asserted.
Cited sections: Complete abstract; 300 adults; 16-week primary fasting-glucose endpoint; funding and conflict statements
Scope & review
- Population
- General readers; individual allergy and gastrointestinal tolerances vary
- Exposure or intervention
- Whole dried/canned pulses and wider legume categories; protein isolates and soybean-specific disease claims excluded
- Comparison
- Source-specific food forms, comparator diets and preparation methods
- Outcomes
- Nutrient contribution, LDL cholesterol, self-reported gastrointestinal symptoms and acute lectin illness
- Timeframe
- Meal preparation and short controlled feeding trials; lifelong disease prevention not established here
- Jurisdiction
- FAO categories, Canadian kidney bean safety, UK allergen information and original international studies
Selected-source educational explanation. Official guidance, original study findings and editorial interpretation are distinguished. No exhaustive search, independent systematic synthesis or qualified medical review has been completed.
Sources checked on their individual access dates. Selected sources were checked; ongoing surveillance and qualified review have separate statuses on the coverage page.
Revision history
- 2026-10-10 UTC: Added a sourced explanation in a bounded ten-article batch; qualified review remains pending.
- 2026-10-20 UTC: Added bounded practical/conceptual distinctions and relevant original evidence after full-guide and nearby-topic overlap review; prior prose retained and qualified review remains pending.
What this article still leaves open
- No exhaustive contemporary legume-outcome synthesis or qualified review completed.
- The canned-bean paper numerical results were not retrieved; no fixed sodium-reduction percentage is asserted.
- Food allergy management and gastrointestinal treatment require separate individual assessment.
Suggest a correction
Submit a content correction to the editorial queue, or download a local note. Leave out personal medical details. Submitted text is stored privately with a browser receipt session and is visible to this browser and the editor. Clearing cookies removes access to your submission history. This is not an account or a medical service.
Your submitted corrections for this article
Explore the topic map
Browse the health domains connected to this article. The map also identifies topics whose articles remain unwritten.