A 91-day feeding study in rats with caprenin

Area of Science:

• Toxicology
• Nutrition Science
• Dietary Fats

Background:

• Caprenin is a randomized triglyceride composed of caprylic (C8:0), capric (C10:0), and behenic (C22:0) acids.
• Understanding the safety profile of novel dietary fats like caprenin is crucial for nutritional applications.

Purpose of the Study:

• To evaluate the toxicological effects of caprenin administration in Sprague-Dawley rats over a 91-day period.
• To determine the no-observable-adverse-effect level (NOAEL) of caprenin in a semi-purified diet.

Main Methods:

• Rats were fed diets containing caprenin at 5.23%, 10.23%, or 15.00% (w/w) for 91 days, with corn oil or a corn oil/MCT oil blend as controls.
• Comprehensive evaluations included survival, clinical signs, body weight, feed efficiency, organ weights, hematology, clinical chemistry, and histopathology.
• Analysis for behenic acid (C22:0) storage in specific fat depots was also conducted.

Main Results:

• No significant differences in body weight gain were observed across groups.
• Feed conversion efficiency was reduced only in the high-dose caprenin group.
• No adverse effects were detected, and significant C22:0 accumulation was not found in examined fat depots.

Conclusions:

• The no-observable-adverse-effect level (NOAEL) for caprenin is greater than 15% (w/w) in the diet, representing over 83% of total dietary fat.
• Caprenin demonstrates a favorable safety profile with no detected adverse effects at the tested doses.
• These findings support the potential use of caprenin as a safe dietary fat component.