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Broad Bean

High protein, high fibre — and genuinely dangerous for people with G6PD deficiency.

What is Broad Bean?

Broad beans are high in protein and fibre and contain L-dopa, a precursor to dopamine. They also cause severe haemolytic anaemia in people with G6PD deficiency — a condition called favism.

Pod vegetables sit between vegetables and pulses. Picked young they behave like vegetables — low calorie, high water, high vitamin C. Left to mature and dry they become pulses, with several times the protein and fibre.

Key nutrients

Per 100g raw.

Calories~88 kcal
Protein~7.9 g
Fibre~2.6–5 g
Vitamin Cgood to high
Vitamin Kpresent
Folategood

Conditions Broad Bean may help

Based on the nutrients and fibre this food supplies. These are supporting foods, not treatments.

Best preparation & usage

Cook briefly and hot. Pod vegetables lose colour, texture and vitamin C fast.

Frozen peas are excellent. They are frozen within hours of picking, and often carry more vitamin C than fresh peas that spent a week in transit.

Blanch and shock if you want them bright green — boiling water, then straight into ice water.

String them if needed — older pods develop a tough fibre along the seam.

Why Broad Bean works

Young pods are mostly water and cell wall, which is why they are crisp and low in calories. As the seed inside matures, the plant packs in protein and starch — which is the difference between a green pea and a dried split pea.

The vitamin C is the most heat-sensitive thing in them. Prolonged boiling can destroy the majority of it, which is a real argument for steaming or brief high-heat cooking.

Who should avoid or limit

G6PD deficiency: broad beans cause severe haemolytic anaemia in people with this inherited condition, which is most common in Mediterranean, Middle Eastern, African and South Asian populations. If you have it, avoid broad beans entirely.

On MAOI antidepressants: broad beans are high in tyramine and L-dopa and can cause a dangerous blood pressure rise. Check with your doctor.

Kidney disease: potassium may need limiting. Ask your doctor for your numbers.

IBS: several vegetables are high-FODMAP and commonly trigger symptoms — tolerance is personal.

This is information, not a prescription. If you are managing a diagnosed condition or taking medication, talk to your doctor before making a large change to your diet.

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Sources & further reading

Nutrition figures on this page come from standard food composition data. These links let you check the numbers and read the underlying research yourself rather than taking our word for it.