{"id":19350,"date":"2026-10-10T05:07:35","date_gmt":"2026-10-09T21:07:35","guid":{"rendered":"https:\/\/www.gofitorganic.com\/singapore\/white-kidney-bean-extract-carb-blocker\/"},"modified":"2026-10-10T05:07:35","modified_gmt":"2026-10-09T21:07:35","slug":"white-kidney-bean-extract-carb-blocker","status":"publish","type":"post","link":"https:\/\/www.gofitorganic.com\/singapore\/white-kidney-bean-extract-carb-blocker\/","title":{"rendered":"White Kidney Bean Extract: How Carb Blockers Work, Benefits and Side Effects (Singapore 2026)"},"content":{"rendered":"
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Short answer:<\/strong> White kidney bean extract is a powder made from the white kidney bean (Phaseolus vulgaris<\/em>) that carries a natural alpha-amylase inhibitor, a protein that slows the enzyme your body uses to break down starch, which is why it is sold as a \u201ccarb blocker\u201d. It does not stop you digesting carbs; at most, part of the starch in a meal is digested more slowly or less completely, and results vary from person to person. It is generally well tolerated, though some people notice wind or bloating at first. In Singapore we sell it as one of the ingredients in ZENSO Kuro Shuga, a chewable taken before lunch and dinner: see Kuro Shuga on our Singapore store<\/a>.<\/p>\n<\/div>\n

White kidney bean is a common ingredient in carb blockers sold in Singapore, from tablets to the jelly sticks sold as \u201ccarb gel\u201d. Here is what it can and cannot do.<\/p>\n

See also: ZENSO review Singapore: how the sets compare<\/a>.<\/em><\/p>\n

What is white kidney bean extract?<\/h2>\n

White kidney bean extract comes from the white variety of the common bean, Phaseolus vulgaris<\/em>, the same species as the red kidney bean (cannellini beans are a type of white kidney bean). The dried beans are ground and usually concentrated so that a small dose carries more of one protein, an alpha-amylase inhibitor sometimes called phaseolamin, which is why the extract is sold as a carb blocker. Labels range from a standardised \u201cextract\u201d to a plain \u201cwhite kidney bean powder\u201d.<\/p>\n

How does a carb blocker work?<\/h2>\n

Starch, the main carbohydrate in rice, noodles, bread and potatoes, has to be broken down into sugars before your body can absorb it. The enzyme that starts the job is alpha-amylase, found in saliva and, mainly, in the small intestine. An alpha-amylase inhibitor slows that enzyme, so part of the starch in a meal may be digested more slowly or travel further along the gut without being fully broken down.<\/p>\n

Three honest limits apply:<\/p>\n