The Claim

Genetically predicted higher intake of artificial sweeteners in coffee is associated with a 26% increased risk of type 2 diabetes mellitus in individuals of European ancestry, with reduced high-density lipoprotein cholesterol levels as a partial mediator.

Source: Associations between artificial sweetener intake from cereals, coffee, and tea and the risk of type 2 diabetes mellitus: A genetic correlation, mediation, and mendelian randomization analysis

What the research says

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

Correlation
1 study reviewed
In plain English

In people of European ancestry, genetic markers indicating higher consumption of artificial sweeteners in coffee are linked to a 26% higher rate of type 2 diabetes, and this association is partly explained by lower levels of high-density lipoprotein cholesterol.

See the scientific wording

Genetically predicted higher intake of artificial sweeteners in coffee is associated with a 26% increased risk of type 2 diabetes mellitus in individuals of European ancestry, suggesting a potential link that may be partially mediated by reduced high-density lipoprotein cholesterol levels.

Why this might work

When artificial sweeteners are consumed in coffee, they change the gut bacteria, which disrupts how the liver handles fats and cholesterol. This causes good cholesterol levels to drop, which prevents the body from removing excess cholesterol from tissues and reduces how well insulin works in muscles and the pancreas. Over time, this leads to high blood sugar and type 2 diabetes.

Supported mechanismbased on 1 study

What the research says

1 study
  1. Study: Associations between artificial sweetener intake from cereals, coffee, and tea and the risk of type 2 diabetes mellitus: A genetic correlation, mediation, and mendelian randomization analysis

    This study found that people who are genetically more likely to add artificial sweeteners to their coffee also have a higher chance of getting type 2 diabetes, and part of the reason may be that their 'good' cholesterol (HDL) goes down.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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