Evidence supporting the use of: White Kidney Bean
For the health condition: Weight Loss

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Synopsis

Source of validity: Scientific
Rating (out of 5): 2

White kidney bean extract (Phaseolus vulgaris) is primarily used for weight loss based on scientific interest in its ability to inhibit alpha-amylase, an enzyme responsible for breaking down carbohydrates in the digestive tract. By blocking this enzyme, it is hypothesized that fewer carbohydrates are absorbed, potentially resulting in lower calorie intake and, over time, weight loss. Several small randomized controlled trials have investigated this effect. Some studies report modest reductions in body weight and fat mass when white kidney bean extract is used alongside a carbohydrate-rich diet, particularly when combined with caloric restriction or exercise. However, the magnitude of the effect is generally small, with average weight loss in studies typically less than 2-3 kg over 8-12 weeks.

A 2020 systematic review and meta-analysis of clinical trials concluded that while there is evidence for a statistically significant reduction in body weight and fat mass compared to placebo, the overall quality of the studies is variable, with short durations, small sample sizes, and possible publication bias. Side effects are generally mild and gastrointestinal in nature. There is no strong historical/traditional use of white kidney bean for weight loss; its use is based on scientific rationale and not ethnobotanical tradition. In summary, while there is some scientific evidence supporting its use for modest weight loss, it is not robust and should be considered preliminary.

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