γ-Cyclodextrin Co-Ingestion Enhances the Bioavailability of Perilla Oil, Regardless of Inclusion Complex Formation

Area of Science:

• Nutritional Biochemistry
• Food Science and Technology
• Pharmacokinetics

Background:

• Perilla oil, rich in alpha-linolenic acid (ALA), shows improved bioavailability when complexed with gamma-cyclodextrin (γ-CD).
• The necessity of actual complex formation versus simple co-ingestion for this bioavailability enhancement remains undetermined.

Purpose of the Study:

• To investigate whether gamma-cyclodextrin (γ-CD) enhances perilla oil absorption via complexation or simple co-ingestion.
• To compare the effects of a γ-CD-perilla oil inclusion complex versus a physical mixture on rat plasma fatty acid profiles.

Main Methods:

• Rats were fed either a γ-CD-perilla oil inclusion complex or a physical mixture of γ-CD and perilla oil for four weeks.
• Plasma fatty acid profiles were analyzed to assess the bioavailability of perilla oil components.

Main Results:

• Both treatment groups exhibited significant alterations in plasma fatty acid composition compared to the control group.
• No significant differences in plasma fatty acid profiles were observed between the inclusion complex group and the physical mixture group.

Conclusions:

• Gamma-cyclodextrin (γ-CD) aids intestinal absorption of perilla oil through co-ingestion, independent of stable inclusion complex formation.
• γ-CD shows potential as a practical delivery aid for enhancing the bioavailability of ALA-rich oils, warranting further mechanistic studies.