Efficacy of two elemental diets: a pair feeding study.

Area of Science:

• Nutritional Science
• Animal Physiology
• Biochemistry

Background:

• Elemental diets are used for nutritional support when the gastrointestinal tract needs rest.
• Vivonex-HN and Criticare-HN are two commonly used elemental diets.
• Understanding their comparative efficacy and potential side effects is crucial for clinical application.

Purpose of the Study:

• To compare the efficacy and side effects of Vivonex-HN and Criticare-HN in Sprague-Dawley rats.
• To assess nutritional support and identify potential adverse effects of the elemental diets.

Main Methods:

• Twenty Sprague-Dawley rats were divided into three groups: Vivonex-HN (ad libitum), Criticare-HN (pair-fed), and a control group (rat chow).
• Daily measurements included body weight, food intake, and nitrogen balance over 21 days.
• Blood urea nitrogen and SGPT levels were measured on the final day.

Main Results:

• Both elemental diets supported body weight gain similarly to the control group.
• Nitrogen balance was comparable between the two elemental diets but lower than the control group.
• Blood urea nitrogen was higher in the Vivonex-HN group than Criticare-HN, but both were lower than controls.
• SGPT levels were elevated in both elemental diet groups compared to controls.
• Liver weights were significantly higher in the Criticare-HN group.

Conclusions:

• Vivonex-HN and Criticare-HN demonstrate comparable efficacy for nutritional support.
• Criticare-HN may lead to increased liver fat accumulation, warranting further investigation.
• Both elemental diets resulted in altered biochemical markers compared to a standard chow diet.