Synopsis

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

White kidney bean (Phaseolus vulgaris) extract is used as a dietary supplement for weight management and to support fat metabolism, primarily due to its content of phaseolamin, an alpha-amylase inhibitor. While it does not directly affect fat metabolism, it inhibits the digestion and absorption of carbohydrates, which can lead to reduced caloric intake and, indirectly, fat loss. Several clinical studies have evaluated white kidney bean extract’s effects on body weight and composition. In a 12-week randomized, double-blind, placebo-controlled trial, participants taking the extract experienced modest but statistically significant reductions in body weight and fat mass compared to placebo. However, the observed effects are generally small, and most benefits are attributed to carbohydrate blocking rather than direct modulation of fat metabolism pathways.

The evidence supporting the use of white kidney bean extract for fat metabolism is rated as low to moderate (2/5). While there is some scientific backing for its role in weight management via carbohydrate absorption inhibition, there is little direct evidence showing a significant effect on fat metabolism itself. Meta-analyses conclude that while the extract may aid in modest weight loss, further large-scale, high-quality studies are needed to confirm its efficacy and clarify its mechanisms. The use of white kidney bean for this purpose is not rooted in traditional medicine but is based on modern pharmacological research.

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