Weight loss

White kidney bean extract

Also called: phaseolus vulgaris, carb blocker

An extract said to block starch digestion.

Why people take it
Weight loss.
What the evidence says
Small effects at best.
How it is usually taken
Usually 500 mg to 1.5 g before starchy meals.
Be careful
Gas and bloating.
Medicines it can interact with
May add to diabetes medicines.

Other weight loss

Garcinia cambogiaRaspberry ketonesGreen coffee beanForskolinOrlistat (OTC)CapsaicinKeto pillsSemaglutide (not a supplement)

Common questions

What is White kidney bean extract?

An extract said to block starch digestion.

Why do people take White kidney bean extract?

Weight loss.

Does White kidney bean extract work?

Small effects at best.

How much White kidney bean extract do people take?

Usually 500 mg to 1.5 g before starchy meals.

Is White kidney bean extract safe?

Gas and bloating.

Does White kidney bean extract interact with medicines?

May add to diabetes medicines.

Sources and further reading

Last reviewed 31 October 2026. Written by Satya Babu.

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For information only, not medical advice. Supplements are not medicines: they are not tested and approved like drugs before they are sold, and they can interact with medicines. Talk to your doctor or pharmacist before you start one, especially if you are pregnant or breastfeeding, take regular medicines, or have kidney, liver or heart disease.