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A Method for Evaluating the Reinforcing Properties of Ethanol in Rats without Water Deprivation, Saccharin Fading or Extended Access Training

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A Low Protein, High Carbohydrate Diet Attenuates Alcohol Intake in Rats.

J F Wilson¹, L M Evans¹, R E Murphy¹

¹a Psychology Department , Wittenberg University , Springfield , OH 45501 , USA.

Nutritional Neuroscience

|July 14, 2016

Summary

A specific diet significantly reduced alcohol consumption in rats. A low-protein, high-carbohydrate diet decreased alcohol intake by 60-80%, potentially by increasing brain serotonin.

Keywords:

Alcohol intake High carbohydrate diets Low protein diets Serotonin

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Area of Science:

Neuroscience
Nutritional Science
Behavioral Science

Background:

Alcohol consumption is a significant public health concern.
Serotonergic drugs are known to reduce alcohol intake.
Dietary manipulation is a potential strategy to influence alcohol consumption.

Purpose of the Study:

To investigate if a tryptophan-enhancing diet can reduce alcohol intake in rats.
To compare the effects of different dietary compositions on alcohol consumption.
To explore the potential role of serotonin in mediating dietary effects on alcohol intake.

Main Methods:

Two experiments were conducted using male, alcohol-drinking rats.
Rats were assigned to isocaloric diets varying in protein and carbohydrate content.
Alcohol intake and diet consumption were measured daily over several weeks.

Main Results:

Rats fed a low-protein, high-carbohydrate diet drank 60-80% less alcohol compared to other dietary groups.
This significant reduction in alcohol intake was observed across both experiments.
No significant differences in overall diet intake were noted between groups.

Conclusions:

Dietary manipulation, specifically a low-protein, high-carbohydrate diet, can substantially reduce alcohol consumption in rats.
The observed reduction in alcohol intake is likely mediated by increased brain serotonin levels.
This suggests a potential dietary intervention strategy for reducing alcohol consumption.