As Americans started eating more processed vegetable oils, rates of insulin resistance and diabetes went up at almost the same time—this timing suggests the two might be connected.

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The energy model of insulin resistance: A unifying theory linking seed oils to metabolic disease and cancer

Narrative Review

2025

This study says that the processed seed oils we eat a lot more of now (like soy and canola oil) might be causing our bodies to become resistant to insulin, which leads to type 2 diabetes—and the timing matches up: as we ate more of these oils, diabetes rates went up too.

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Source Study

The energy model of insulin resistance: A unifying theory linking seed oils to metabolic disease and cancer

Score: 1

DOI: 10.3389/fnut.2025.1532961

Similar Assertions

Pre-20th century human populations exhibited prevalence rates of cardiovascular disease, obesity, and type 2 diabetes below 1–5%, coinciding with minimal consumption of industrially processed seed oils.

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74%

Over the last 50 years, the fat stored in our bodies has changed—more of it comes from processed vegetable oils, which might be changing how our body burns energy.

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70%

The introduction of industrial seed oils into the American food supply coincided temporally with the emergence and exponential rise in recorded cases of cardiovascular disease and metabolic disorders.

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70%