In common with other beans the mature bean in string or runner bean ( Phaseolus aborigineus ) is definitely poisonous. In their mature state they contain Prussic ( Hydrocyanic ) Acid or Cyanogenic Aminoglycoside in quantity.
In moderation eating them straight from the climber bush very very young tender beans should not be a problem but stressing again in MODERATION. Even young eaten in quantity the beans need thoroughly cooked / boiled to negate and potential poison. The cooking action neutralises the active part. Mature beans which have already turned purple are toxic whilst the outer casing has turned ‘ stringy ‘ and in any case is no longer fit to eat.
Nature warns us with this angry colour , the plant is protecting the seed product against mammals.
In moderation eating them straight from the climber bush very very young tender beans should not be a problem but stressing again in MODERATION. Even young eaten in quantity the beans need thoroughly cooked / boiled to negate and potential poison. The cooking action neutralises the active part. Mature beans which have already turned purple are toxic whilst the outer casing has turned ‘ stringy ‘ and in any case is no longer fit to eat.
Nature warns us with this angry colour , the plant is protecting the seed product against mammals.
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