mung bean
Meaning of mung bean: A small green legume better known as a sprout, and one of many foods given cancer claims that its nutrition does not support.
Definition of mung bean
The mung bean is a small green legume grown across Asia, eaten whole, split, ground into flour, or germinated into the crisp sprouts sold as bean sprouts. Like other pulses it supplies protein, fiber, folate and minerals with almost no fat. Its starch is also the basis of the transparent noodles used in several Asian cuisines.
What does it contribute to a diet?
What pulses generally contribute, in a form that cooks quickly and needs no soaking. Protein content is high for a plant food, though low in one essential amino acid, which is why beans and grains eaten across the same day complement each other. Much of the fiber is the type fermented by gut bacteria, and the folate content is high enough to matter in diets built around rice. Sprouting shifts the profile again: enzymes in the germinating seed break down some of the compounds that block mineral absorption, and vitamin C appears where the dry seed had almost none.
How do the forms compare?
| Form | How it is used |
|---|---|
| Whole dried bean | Boiled into soups and stews |
| Split and skinned | Cooks quickly into a soft dal |
| Flour | Batters, pancakes and noodles |
| Sprouts | Eaten raw or briefly cooked |
| Extracted starch | Transparent noodles and jellies |
The sprouts carry a food safety consideration the dry bean does not. Sprouting needs warmth and moisture, which are exactly the conditions bacteria need, so any contamination on the seed multiplies during germination. Raw sprouts of several kinds have been traced to outbreaks of foodborne illness, and thorough cooking removes that risk.
Do the anticancer claims hold up?
They rest on the same foundation as most such claims: laboratory experiments in which a plant extract slows the growth of cells in a dish. Mung bean contains flavonoids, plant sterols and other compounds that behave that way at concentrations far beyond anything a meal produces in the body. No trial has shown that eating the bean prevents or treats any cancer, and no anticancer therapy has emerged from it. The same gulf between dish and person applies to plant preparations generally, including the heavily studied grape seed extract. Saying that mung bean may have anticancer effects lends a laboratory observation the weight of a finding about people.
Also known as
Used in a sentence
The dietary history recorded regular intake of pulses including mung bean.
Good to know
Claims that mung bean has anticancer effects trace back to laboratory work on plant extracts at concentrations no meal produces, and no trial in people supports them.