Recent research finding

No.76 Defining the mechanism of reduced blood cholesterol by α-cyclodextrin supplementation ③


*This research was reported in 31th Cyclodextrin Symposium (Shimane, Sep. 11~12, 2014).


Our company has attract attention technologies in functional food and personal care fields which raises the water solubility, stability and bioavailability of functional ingredients by using the inclusion property of cyclodextrin (CD).

Because of its high water solubility and non-digestible property, αCD can be taken as a water-soluble dietary fiber. Indeed, daily intake of αCD shows some anti-metabolic syndrome effects, improvements of the intestinal environment and anti-allergy effect. We also reported some interesting results supporting those effects (* please refer to the newest result of research "16th", "42th", "44th" and "50th" of our homepage for details.).

In this study, we report a new knowledge of αCD function on the mechanism of reduced blood cholesterol level by αCD supplementation.

Functions of αCD (human trial)

  1. Anti-metabolic syndrome
    Lowering effect of fat and cholesterol
    Inhibition effect against an elevation in blood glucose level
  2. Regulation of intestinal functions
  3. Anti-allergy
    Atopic dermatitis, Cedar pollen allergy, Asthma

Our previous study

Lecithin was precipitated from bile acid micelle by complexation with αCD.
Therefore, aqueous solubility of cholesterol was lowered in artificial intestinal juice (FeSSIF) due to reducing lecithin content by the complexation of lecithin with αCD.

We clarified one of the mechanisms of the reducing effect of blood cholesterol level by αCD supplementation.
Further studies are continued for understanding the details of the mechanisms.

In this study

The decreasing effect of αCD on the solubility of Cholesterol in FeSSIF was compared with other water soluble dietary fibers.

Water soluble dietary fibers and lipid lowering drug

•Resistant Maltodextrin (RM) •Partially hydrolyzed (PHGG) •Inulin (Inu)
•Polydextrose (PDX) •Cholestyramine (CSA: Lipid lowering drug)


Result. Comparison of αCD with other dietary fibers
Fig 1 Solubility of cholesterol in FeSSIF

Significant decrease of the solubility of cholesterol in FeSSIF was observed only in the presence of αCD.


αCD could be a potent inhibitor of the absorption of cholesterol from food matrix by interaction with lecithin in intestinal juice.

This mechanism have not be observed in other dietary fibers. So, we recommend for daily intake of αCD as a unique and effective dietary fiber with many benefits.