7. Botanical Extract

» 7. Botanical Extract

  • Specifications

What is it?

White kidney bean is a variety of the common bean (Phaseolus vulgaris), which contains a protein (α-amylase blocker) that blocks the breakdown and digestion of starch.

In humans, this protein may:

  • Act as a carbohydrate absorption blocker
  • Help burn fat reserves
  • Suppress appetite
  • Reduce blood sugar and insulin spikes after meals

Additionally, white kidney beans contain the lectin phytohemagglutinin. While high amounts of phytohemagglutinin are toxic to humans, lower concentrations can have appetite-suppressing effects.

For these reasons, white kidney bean extract is sold under different brands as a weight loss supplement. The main white kidney bean extract supplements are:

  • Phase 2 (also known as Phaseolamin 2250, Phase 2 Starch Neutralizer, and Starch Lite), an α-amylase blocker.
  • Beanblock, a combination of an α-amylase blocker and phytohemagglutinin.


  • Product name: White Kidney Bean Extract
  • Latin Name: Phaseolus vulgaris Linn.
  • Color: Light yellow fine powder
  • Specification: 3%,10:1-50:1
  • Test method: TLC
  • Storage: In cool, dry and clean
  • Shelf life: 2 years


1. White kidney bean extract can be used to treat obesity, act as a weight stabilizer or even as a weight loss aid. It can neutralize the digestive enzyme alpha amylase before it can convert starch into glucose and then fat. Essentially, it allows the carbohydrates to pass through the system possibly with less caloric intake.
2.With the function of protecting kidney
3.Promoting body development and reinforcing the memory
4. To neutralize the digestive enzyme alpha amylase before it can convert starch into glucose and then fat
5. White kidney bean extract may also be beneficial for lowering triglycerides, degenerative arthritis, coronary artery disease and obesity because of the ability it has to inhibit the body’s digestion of complex carbohydrates.


The main active compounds of white kidney bean extract are:

  • α-Amylase blocker: also referred to as phaseolamin, this lectin acts as a carbohydrate blocker by preventing the binding of starch to the enzyme that breaks it down (α-amylase). This means that fewer carbohydrates are absorbed into the body.
  • Phytohemagglutinin: this lectin binds to receptors on the intestinal lining and suppresses appetite by influencing the release of certain hormones (decreases ghrelin).

Other white kidney bean compounds that might be present in small amounts are:

  • Trypsin and chymotrypsin blockers: block the protein-digesting enzymes trypsin and chymotrypsin. High-temperatures and pressure can destroy these blockers, preventing the digestive problems experienced when eating beans or taking in the extract.
  • Phaseolin: although it is a very nutritious amino acid source, this protein can cause allergies.
  • Saponins: these substances can have both positive (acts as an antioxidant and protection against fungi and viruses) and negative (reduced protein digestion and mineral uptake) effects.
  • Phytic acid: its intake reduces the absorption of mineral nutrients and the digestion of proteins but enhances the immune system and can protect against some cancers.
  • Arcelins: these lectins bind to a membrane in the gut of insects and prevent them from absorbing nutrients. No effects have been described in humans.

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