When your body breaks down aspartame (an artificial sweetener), it makes three substances that, in lab studies, might mess with brain cell signaling and cause stress — potentially harming the tiny blood vessels and nerves in the brain.

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Evidence from Studies

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Artificial sweeteners and brain health: critical evaluation of aspartame impact on neurovascular and cognitive consequences

Narrative Review

Human

This study says that aspartame, the artificial sweetener, might harm the brain by triggering harmful chemical reactions, even at normal intake levels — which matches what the claim says.

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Source Study

Artificial sweeteners and brain health: critical evaluation of aspartame impact on neurovascular and cognitive consequences

Score: 1

DOI: 10.1108/nfs-05-2025-0161

Similar Assertions

Scientists think that a special connection between brain blood vessels and nerve cells might be how the artificial sweetener aspartame harms the brain — by causing too much excitement in nerves, creating harmful chemicals, and messing with brain signals.

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When your body breaks down aspartame (an artificial sweetener), it turns into three things you already get from foods like meat, beans, and fruit—and your body doesn’t store them up over time.

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