The Claim

Among middle-aged adults aged less than 60 years, higher consumption of low- and no-calorie sweeteners (at least 92.1 mg/day) is associated with a faster decline in verbal fluency and global cognition over an 8-year period, with the highest tertile of intake linked to a β = -0.040 decline in verbal fluency and β = -0.024 in global cognition.

Source: Association Between Consumption of Low- and No-Calorie Artificial Sweeteners and Cognitive Decline: An 8-Year Prospective Study.

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
52score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Correlation
2 studies reviewed
In plain English

Middle-aged adults who consume at least 92.1 mg per day of low- and no-calorie sweeteners experience a measurable faster decline in verbal fluency and overall cognitive function over eight years compared to those who consume less.

See the scientific wording

Among middle-aged adults (aged <60 years), higher consumption of low- and no-calorie sweeteners (≥92.1 mg/day) is associated with a faster decline in verbal fluency and global cognition over an 8-year period, with the highest tertile of intake linked to a β = -0.040 decline in verbal fluency and β = -0.024 in global cognition, suggesting a potential long-term impact on cognitive function in this population.

Why this might work

Eating too many artificial sweeteners changes the bacteria in the gut, which triggers inflammation throughout the body. This inflammation weakens the barrier that protects the brain from harmful substances, making it harder for the brain to use sugar for energy. As a result, brain areas responsible for memory and word-finding lose function over time.

Suggested mechanismbased on 2 studies

What the research says

2 studies

  1. Study: Association Between Consumption of Low- and No-Calorie Artificial Sweeteners and Cognitive Decline: An 8-Year Prospective Study.

    People under 60 who drank a lot of diet sweeteners (more than 92 mg per day) over eight years showed slightly faster declines in memory and word-finding skills than those who drank less. The study found this link clearly in middle-aged adults.

  2. Study: Association Between Consumption of Low- and No-Calorie Artificial Sweeteners and Cognitive Decline: An 8-Year Prospective Study.

    People under 60 who drank a lot of diet sodas or ate foods with artificial sweeteners (more than 92 mg per day) tended to lose a little more of their memory and word-finding skills over 8 years than those who ate less.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 2 supporting studies

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