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

Scientists test artificial sweeteners on animals using way more than humans would ever eat, then say it’s safe for people by dividing that huge dose by 100—but that doesn’t match how much people actually consume.

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.

Eating or drinking things with aspartame, even in amounts considered safe, might be linked to more brain inflammation and faster memory or thinking problems in kids, teens, or people who are overweight or have metabolic issues.

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.

We don’t know for sure if aspartame harms the brain over time because most studies have been too short and too small to catch slow-building problems, especially in people who might be more sensitive to it.

The safe amount of aspartame set for everyone might be too high for some people—like kids or those with certain health conditions—because their bodies might react differently to it.