Herbal Extract
White Kidney Bean Extract (Phaseolus vulgaris)
Also known as: Phaseolus vulgaris extract, Kidney bean extract, Phase 2, Carb blocker
White kidney bean extract contains alpha-amylase inhibitors that may reduce carbohydrate digestion and absorption. Research shows modest effects on postprandial blood glucose and weight management, though clinical significance remains limited.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Common questions
How much White Kidney Bean Extract (Phaseolus vulgaris) should I take?
The typical range is 500–3,000 mg daily, typically 1,500–2,000 mg. Typically used daily for 8–12 weeks in clinical trials; can be used long-term
When should I take White Kidney Bean Extract (Phaseolus vulgaris)?
With main meals containing carbohydrates. Must be taken with food containing carbohydrates to be effective.
Which form of White Kidney Bean Extract (Phaseolus vulgaris) is best?
Powder. Other forms in the catalog: Capsule, Tablet.
Is White Kidney Bean Extract (Phaseolus vulgaris) safe?
Commonly reported: Bloating, Flatulence, Abdominal discomfort, Constipation.
Which White Kidney Bean Extract (Phaseolus vulgaris) supplement scores highest?
Nutricost White Kidney Bean Capsules, at 66/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.
Primary uses
- Carbohydrate digestion reduction
- Postprandial glucose management
- Weight management support
- Blood sugar support
How it works
- Alpha-amylase inhibition reduces starch breakdown
- Delays carbohydrate absorption in small intestine
- May reduce postprandial glucose spikes
Dosage
- Typical range
- 500–3,000 mg daily, typically 1,500–2,000 mg
- Timing
- With main meals containing carbohydrates
- With food
- Must be taken with food containing carbohydrates to be effective
- Duration
- Typically used daily for 8–12 weeks in clinical trials; can be used long-term
- Special populations
- Generally safe in adults; limited data in pregnancy/lactation and pediatric populations
Forms
- Powder· 70/100
- Capsule· 70/100
- Tablet· 70/100
Safety
Common side effects
- Bloating
- Flatulence
- Abdominal discomfort
- Constipation
Contraindications
- Inflammatory bowel disease (may exacerbate symptoms)
- Severe gastrointestinal conditions
Products containing White Kidney Bean Extract (Phaseolus vulgaris)
Top-scoring supplements in our catalog that list White Kidney Bean Extract (Phaseolus vulgaris) on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Multiple RCTs show modest benefits for glucose control and modest weight loss (~2-3 lbs over 8-12 weeks), but effect sizes are small and heterogeneous. Some studies funded by ingredient suppliers. Not suitable for A-B grade due to modest clinical magnitude and variable study quality.
Grade C: Mostly observational or small trials; mechanism is plausible but unproven at scale.
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.