Benefits
Weight and adiposity
In a randomized controlled trial, white kidney bean extract supported reductions in body weight and body fat as part of a calorie-controlled approach.
Carbohydrate management
By slowing starch digestion, it lowers the sugar and calories absorbed from starchy meals, blunting post-meal glucose.
Appetite and energy steadiness
Slower carbohydrate absorption supports steadier energy and may aid fullness after meals.
Mechanism of action
Alpha-amylase inhibition
Phaseolamin binds the digestive enzyme alpha-amylase, temporarily reducing its ability to break starch into absorbable sugars.
Reduced starch absorption
With less starch digested in the upper gut, some passes further along, lowering the meal's caloric and glycemic load.
Clinical trials
Randomized controlled trial of white kidney bean extract on body weight and adiposity. (Shi et al. 2026, Nutrition Research)
Overweight adults.
The bean extract supported reductions in body weight and adiposity versus placebo, consistent with its starch-blocking mechanism.