High-intensity sweeteners and energy balance

Area of Science:

• Nutrition Science
• Metabolic Health
• Behavioral Science

Background:

• Epidemiological studies link caloric and non-caloric sweetened beverages to adverse health outcomes.
• Lack of a physiologically relevant model has hindered research into non-nutritive sweeteners' effects on intake and metabolism.
• Pavlovian conditioning principles suggest sweet taste cues may lose predictive value for caloric consequences.

Purpose of the Study:

• To investigate the mechanistic basis by which non-nutritive sweeteners may promote food intake, weight gain, and metabolic disorders.
• To examine the impact of sweet taste-caloric consequence dissociation on physiological responses regulating energy balance.

Main Methods:

• Utilized a rodent model to compare the effects of consuming non-nutritive sweeteners versus glucose.
• Measured food intake, body weight gain, body fat accumulation, and caloric compensation.
• Assessed the ability of sweet taste to evoke thermic responses and other cephalic phase reflexes.

Main Results:

• Rodents consuming non-nutritive sweeteners showed increased food intake, body weight gain, and fat accumulation compared to glucose consumers.
• Caloric compensation was weaker in rodents consuming non-nutritive sweeteners.
• Evidence suggests saccharin consumption may impair sweet taste's ability to elicit thermic responses and other energy-balancing reflexes.

Conclusions:

• Dissociation between sweet taste and caloric consequences from non-nutritive sweeteners may disrupt energy balance regulation.
• This disruption can lead to increased adiposity and metabolic dysregulation.
• Further research is needed to fully elucidate the physiological mechanisms involved.