Laboratory researcher analysing data on a screen

Artificial Sweeteners Linked to Higher Type 2 Diabetes Risk

A systematic review and meta-analysis published in Frontiers in Nutrition on 11 August 2026 has found that adults with higher reported intake of artificial sweeteners face a greater risk of developing type 2 diabetes than those who consume little or none. Researchers led by Lu and colleagues pooled data from six prospective cohort studies covering 721,003 adults across the United States, Japan and Europe. Over an average follow-up of 10.1 years, 38,445 participants went on to develop type 2 diabetes. Those with the highest reported intake of artificial sweeteners had a 31% higher risk of the disease than those with the lowest intake, a pooled hazard ratio of 1.31. The analysis pooled exposure across diet drinks and other artificially sweetened products rather than singling out one sweetener. The authors, whose work was supported by a Jiangsu Province research grant, say the finding adds to a body of observational evidence questioning whether artificial sweeteners are a metabolically neutral substitute for sugar.

Why the findings come with caveats

The review's authors rated the certainty of evidence as low under GRADE criteria. All six included studies were observational, so they can show an association but cannot prove artificial sweeteners cause diabetes. The pooled analysis also showed substantial heterogeneity between studies, with an I-squared value of 86%, and dietary intake was self-reported, which introduces recall bias. The authors flagged reverse causation as a particular concern: people already at higher risk of type 2 diabetes, including those who are overweight, commonly switch to artificially sweetened products to cut sugar intake, which could inflate the apparent association rather than cause it.

What this means for you

This is one meta-analysis of observational data, not a clinical trial, and it does not show that artificial sweeteners cause type 2 diabetes. The researchers themselves call for randomised trials to test the relationship directly before it changes public health advice. For UK shoppers already reading labels on diet drinks and low-sugar foods, it is a reminder that 'no added sugar' is not the same as metabolically inert, a habit that extends to the everyday health and nutrition products stocked across Perqen's full catalogue.

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This article reports published news and research and is for information only. Food supplements are not a substitute for a varied diet or medical care, and no product mentioned is intended to diagnose, treat, cure or prevent any disease. Speak to your GP or pharmacist before changing what you take, especially if you are pregnant, breastfeeding, or taking prescribed medicines.

Sources

Originally reported by News-Medical. This article has been reviewed by Dr Tosin.

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