If you have diabetes, your body might absorb more sugar from food — especially fructose — and send more of it to your liver, which could make your body less responsive to insulin and lead to other health problems.

What we've found so far suggests that having diabetes may be linked to increased fructose absorption and greater delivery of fructose to the liver, which could play a role in worsening insulin sensitivity and contributing to metabolic issues [1]. Our analysis of the available research shows this idea is supported by 20.0 studies or assertions, with no studies found that refute it [1]. Based on what we've reviewed so far, people with diabetes might absorb more fructose from their diet than those without diabetes. This fructose may then be more likely to go directly to the liver for processing. When the liver receives large amounts of fructose over time, it could lead to changes that make the body less responsive to insulin — a key feature of metabolic dysfunction. These processes might create a cycle where diabetes influences how the body handles sugar, which in turn could affect the progression of metabolic problems [1]. The evidence we've reviewed leans toward the idea that fructose metabolism is altered in diabetes, and that this alteration may contribute to ongoing metabolic challenges. However, we only have one assertion summarizing this effect, even though it is backed by 20.0 supporting studies. We don’t have details about the study designs, sample sizes, or whether they were conducted in humans or animals. Because of this, we can’t yet say how strong or consistent this pattern is across different populations or settings. Our current analysis does not allow us to draw firm conclusions about cause and effect, only that a pattern has been observed. We also don’t know whether reducing fructose intake would break this cycle, or how much individual responses might vary. Practical takeaway: If you have diabetes, paying attention to sources of fructose in your diet — especially from added sugars like high-fructose corn syrup — might be worth considering, given what we’ve seen so far. But more details from direct research are needed before we fully understand how and why this happens.