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Sword Bean

Legume

Sword Bean

A high-protein, high-fiber tropical legume that must be thoroughly cooked to remove natural toxins.

Sword bean (Canavalia gladiata) is a tropical legume recognized by its large, sword-shaped pods and seeds. It is a high-protein, high-fiber food that requires thorough cooking to neutralize naturally occurring toxins before consumption.

protein and fiber dense legume

Typical serving · 150g

Common varieties · red sword bean, white sword bean, jackbean (related species)

75health

Overall context score across nutrition, safety, and diet fit

At a glance

Quick facts

Simple indicators based on nutrition, processing, and diet fit.

High proteinHigh fiberLow glycemicWeight lossDiabetes-friendlyGut health

The story

What makes it unique

Sword beans are rich in complex carbohydrates, plant protein, and dietary fiber, resulting in slow digestion and high satiety. The raw seeds contain toxic lectins (concanavalin A) and the non-protein amino acid canavanine, which must be denatured through extensive boiling before consumption.

Varieties: red sword bean · white sword bean · jackbean (related species)

#sword bean#canavalia gladiata#toxic legume#high protein bean#plant protein#low glycemic#high fiber food#tropical bean

Per 100g

Nutrition breakdown

Macro balance and key metrics at a glance.

Energy

140kcal

Density 1.40 kcal/g

Protein

9g

Carbs

25g

Fat

1g

Fiber

6g

Sugar

3 g

Sodium

5 mg

Potassium

400 mg

Glycemic index

30

Glycemic load

8

Water content

60%

Standout compounds

Nutrient highlights

  • Protein

    high

    Supports muscle repair and growth

  • Dietary Fiber

    high

    Promotes digestive health and satiety

  • Complex Carbohydrates

    moderate

    Provides sustained energy release

  • Potassium

    moderate

    Helps regulate blood pressure and fluid balance

Wellness map

Health scores & processing

Weight loss
80
Satiety
85
Blood sugar
85
Gut health
80
Heart health
80
Fitness
70
Processing
95

NOVA processing scale

1
Min
2
3
4
Ultra

minimally processed · Whole food

Whole dried or fresh legume requiring traditional home preparation (soaking and boiling) to be edible and safe.

Diet compatibility

  • Weight loss
  • Muscle gain
  • Diabetes
  • Gut health
  • Low carb
  • High protein
  • Heart health

Relative standing

Food rankings

Qualitative ranks compared to similar whole foods.

  • Satietyexcellent
  • Blood sugarexcellent
  • Nutrient densitygood
  • Fitness fuelgood
  • Processing qualityexcellent

Eat with confidence

Food safety profile

Raw sword beans contain toxic levels of canavanine and lectins that can cause severe gastrointestinal distress and toxicity. They must be soaked, boiled thoroughly, and the cooking water discarded to be safe for consumption.

50safety

Evidence confidence 90%

  • Pesticideslow
  • Antibioticslow
  • Heavy metalsmoderate
  • Contaminationhigh

Watch for

  • canavanine
  • concanavalin A (lectins)
  • phytohemagglutinin

Safer choices

Canned or pre-cooked sword beans where toxins are already neutralized, or other common legumes like chickpeas if proper preparation is a concern.

Prep tips

Soak dried beans for at least 12 hours, discard water, then boil vigorously for at least 30-60 minutes. Never eat raw or undercooked sword beans.

Raw sword beans are toxic and not permitted for sale as ready-to-eat products in many regions without clear preparation instructions.

Deep dive

Health analysis

How this food may fit different goals and preparation choices.

  1. Weight loss

    High fiber and protein content promote prolonged satiety, reducing overall calorie intake.

  2. Blood sugar

    Low glycemic index and high fiber slow glucose absorption, preventing blood sugar spikes.

  3. Fitness & energy

    Provides sustained complex carbohydrate energy suitable for endurance activities, though not a rapid post-workout fuel.

  4. Gut health

    Dietary fiber supports healthy bowel movements and feeds beneficial gut bacteria.

  5. Processing quality

    A whole, unprocessed food, though it requires significant home processing (boiling) for safety.

  6. Food safety

    Strict preparation is mandatory; undercooked sword beans are highly toxic due to lectins and canavanine.

  7. Common mistakes

    Eating undercooked beans or failing to discard the soaking and boiling water, which retains the toxins.

  8. Best preparation

    Soak for 12+ hours, discard water, boil thoroughly for at least 30-60 minutes, and drain.

Practical guide

Best use cases

When and how this food fits real eating patterns.

  • High-volume low-calorie eating

    Adds bulk and satiety to meals without excessive calories.

  • Plant-based protein source

    Provides a substantial amount of protein for vegetarian and vegan diets.

  • Blood sugar friendly meals

    Low glycemic impact makes it suitable for balancing carbohydrate intake.

Balance sheet

Pros & cons

Upsides

  • High in plant-based protein
  • Excellent source of dietary fiber
  • Low glycemic index stabilizes blood sugar
  • Very satiating and filling
  • Minimally processed whole food

Trade-offs

  • Highly toxic if eaten raw or undercooked
  • Requires lengthy soaking and boiling preparation
  • Contains canavanine, which may affect individuals with autoimmune conditions if not fully cooked
  • Not suitable for quick meals due to prep time

Fit check

Who is it for?

Great match

  • plant-based diets
  • blood sugar control
  • high-volume eating
  • meal prepping

Consider alternatives

  • raw food diets
  • quick weeknight dinners
  • lectin-sensitive individuals

Side by side

How it compares

Open the full head-to-head analysis for nutrition, safety, and practical tradeoffs.

  • Sword Bean

    This food

    Sword Bean

    VS95% alike
    Jackbean

    Compare with

    Jackbean

    Both are toxic raw and require extensive boiling, but sword bean pods are sometimes eaten young while jackbean pods are typically too fibrous.

    Sword bean and jackbean are nearly identical nutritionally and both require thorough cooking to remove toxins.

    Sword Bean vs Jackbean
  • Sword Bean

    This food

    Sword Bean

    VS80% alike
    Lima Bean

    Compare with

    Lima Bean

    Lima beans are more widely available and have a slightly lower toxin risk, but sword bean offers comparable protein and fiber.

    Lima beans are easier to find and safer to prep, while sword beans offer a similar meaty texture and nutrition profile.

    Sword Bean vs Lima Bean
  • Sword Bean

    This food

    Sword Bean

    VS75% alike
    Kidney Bean

    Compare with

    Kidney Bean

    Kidney beans are more common globally; sword bean has a firmer texture but similar macronutrient profile.

    Kidney beans are a more common alternative with a similar texture and identical need for thorough cooking.

    Sword Bean vs Kidney Bean
  • Sword Bean

    This food

    Sword Bean

    VS70% alike
    Edamame

    Compare with

    Edamame

    Edamame is safe to eat with minimal cooking and higher in protein per calorie, whereas sword bean requires extensive preparation.

    Edamame is safer and faster to prepare with more protein, while sword bean offers a denser, starchier bite.

    Sword Bean vs Edamame
  • Sword Bean

    This food

    Sword Bean

    VS70% alike
    Chickpea

    Compare with

    Chickpea

    Chickpeas are safer to cook and more versatile, while sword beans are denser and require more caution.

    Chickpeas are easier to cook safely, but sword beans provide a slightly firmer texture and higher fiber satiety.

    Sword Bean vs Chickpea
  • Sword Bean

    This food

    Sword Bean

    VS65% alike
    Lentils

    Compare with

    Lentils

    Lentils cook much faster and have lower toxicity risks, while sword beans offer a meatier bite.

    Lentils are faster and safer to cook, making them more convenient, while sword bean is thicker and chewier.

    Sword Bean vs Lentils
  • Sword Bean

    This food

    Sword Bean

    VS65% alike
    Black Bean

    Compare with

    Black Bean

    Black beans are more universally used in Western cooking and slightly easier to prepare safely.

    Black beans are a staple alternative with a similar nutrition profile but less preparation risk than sword bean.

    Sword Bean vs Black Bean
  • Sword Bean

    This food

    Sword Bean

    VS70% alike
    Fava Bean

    Compare with

    Fava Bean

    Fava beans carry a risk for those with G6PD deficiency, while sword beans carry a universal lectin risk if raw.

    Fava beans and sword beans both have specific health risks if not prepared correctly, but offer great fiber and protein.

    Sword Bean vs Fava Bean
  • Sword Bean

    This food

    Sword Bean

    VS60% alike
    Pinto Bean

    Compare with

    Pinto Bean

    Pinto beans are creamier and standard for refrying, while sword beans are firmer and less starchy.

    Pinto beans are creamier and easier to mash, while sword beans hold their shape better and require stricter cooking.

    Sword Bean vs Pinto Bean
  • Sword Bean

    This food

    Sword Bean

    VS50% alike
    Tempeh

    Compare with

    Tempeh

    Tempeh is fermented and ready-to-eat, offering probiotics, whereas sword bean is a whole legume requiring extensive cooking.

    Tempeh provides more protein and gut-friendly probiotics with no toxin risk, whereas sword bean is a whole food requiring careful prep.

    Sword Bean vs Tempeh

Common questions

FAQ

Answers aligned with how people search for this food.

  • Are sword beans poisonous?

    Yes, raw sword beans are poisonous. They contain toxic lectins and canavanine that must be destroyed by soaking and thorough boiling before eating.

  • How do you safely cook sword beans?

    Soak the beans for at least 12 hours, discard the water, then boil them vigorously for 30 to 60 minutes. Always discard the cooking water.

  • Is sword bean good for weight loss?

    Yes, when properly cooked, sword beans are high in protein and fiber, which increase satiety and help control appetite.

  • Can diabetics eat sword beans?

    Yes, sword beans have a low glycemic index and high fiber content, which helps stabilize blood sugar levels after meals.

  • What happens if you eat undercooked sword beans?

    Eating undercooked sword beans can cause severe nausea, vomiting, diarrhea, and abdominal pain due to toxic lectins.

  • What does sword bean taste like?

    When properly cooked, sword beans have a mild, earthy flavor and a firm, meaty texture similar to lima beans or edamame.

Transparency

Data confidence

Estimated confidence for nutrition data, interpretation, safety notes, and comparisons.

85

Nutrition data

90

Health analysis

95

Food safety

85

Comparisons