Related Experiment Videos
Subchronic oral toxicity studies with alpha-cyclodextrin in rats
1TNO Nutrition and Food Research, P.O. Box 360, 3700 AJ Zeist, The Netherlands.
Regulatory Toxicology and Pharmacology : RTP
|July 22, 2004
Summary
Alpha-cyclodextrin (alpha-CD) consumption up to 20% in rat diets for 13 weeks showed no toxicity. Mild gastrointestinal effects like diarrhea were observed at high doses, but no significant adverse health impacts were found.
Area of Science:
- Toxicology
- Food Science
- Carbohydrate Chemistry
Background:
- Alpha-cyclodextrin (alpha-CD) is a cyclic polymer with potential as a water-soluble dietary fiber.
- Assessing the safety of novel food ingredients is crucial for consumer protection.
Purpose of the Study:
- To evaluate the oral toxicity of alpha-cyclodextrin in rats.
- To determine safe dietary levels of alpha-CD for potential food applications.
Main Methods:
- Conducted a 4-week range-finding study and a 13-week oral toxicity study in rats.
- Administered varying dietary levels of alpha-CD (up to 20%) and observed clinical signs, body weight, food intake, hematology, and histopathology.
Main Results:
- No treatment-related mortalities occurred in either study.
- High doses of alpha-CD (15% in 4-week, 20% in 13-week) caused transient diarrhea and reduced body weight in some rats.
- Increased cecum weights were observed at high alpha-CD doses, consistent with other indigestible carbohydrates.
Conclusions:
- Alpha-cyclodextrin up to 20% in the diet did not induce significant toxicity in rats over 13 weeks.
- Observed effects were primarily mild gastrointestinal disturbances, reversible upon cessation of treatment.
- Alpha-CD appears safe for consumption at levels tested, supporting its potential as a food ingredient.