Bitter Melon

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What bitter melon is

EVIDENCEGUIDE 1

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Bitter melon is a good vegetable, but it is not a glucose-lowering drug. A few of its compounds have shown glucose-lowering signals in cell experiments and in mice; in people, trials have so far shown no reliable effect on blood sugar. What those compounds act on in the body, and why the effect fades by the time it reaches a person, is taken apart one by one in the later chapter on where the blood-sugar claim comes from.

If you take glucose-lowering medication, remember one thing: do not use bitter melon in place of your medicine, and do not stop your medicine on your own. Before eating a lot of bitter melon or drinking its juice every day, tell your doctor — stacked on top of the drug, it may push your blood sugar too low.

Bitter melon has a bumpy, warty skin and is common in East, South, and Southeast Asian kitchens: tossed cold, stir-fried, stuffed with meat, or simmered in soup. Its scientific name is Momordica charantia, and it belongs to the gourd family. The bitterness comes from bitter molecules such as cucurbitacins and momordicin. They are normally locked inside the cells of the flesh, and only rush out when you chew those cells open.

As a vegetable, its basics are good: very low in calories, high in water, decent in fiber, with vitamin C that is high for a vegetable, plus some potassium and folate.

A green bitter melon with bumpy skin and a round slice exposing flesh, pith and seeds. — A CLOSER LOOK
From bumpy skin to flesh, pith and seeds
This shows the exterior and cut face; visible structure cannot prove a glucose-lowering effect in people.

Educational content, not medical advice — consult a clinician.

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