Neurobehavioral effects of aspartame consumption

Area of Science:

• Neuroscience
• Food Science
• Public Health

Background:

• Aspartame is a widely used artificial sweetener with ongoing debate regarding its health effects.
• Previous research on aspartame's neurobehavioral impact has yielded mixed results, necessitating further investigation.

Purpose of the Study:

• To investigate the within-subject effects of high versus low aspartame consumption on cognitive function, mood, and headache incidence in healthy adults.
• To assess the relationship between aspartame intake levels and neurobehavioral outcomes.

Main Methods:

• A controlled dietary study involving healthy adults consuming high (25 mg/kg/day) and low (10 mg/kg/day) aspartame diets for 8 days each, separated by a 2-week washout period.
• Assessment of cognitive performance using working memory and spatial orientation tests.
• Evaluation of mood, depression, and headache incidence using standardized scales and food consumption records.

Main Results:

• High aspartame intake was associated with increased irritability, heightened depression symptoms, and poorer performance on spatial orientation tasks.
• No significant impact of aspartame consumption was observed on working memory performance.
• The tested high intake level was below the established acceptable daily intake (ADI) for aspartame.

Conclusions:

• Aspartame consumption, even at levels below the ADI, may adversely affect mood and certain cognitive functions, specifically spatial orientation.
• These findings suggest a need for careful consideration of aspartame intake, particularly concerning its potential neurobehavioral effects.