If you swap out a small amount of fatty foods for sugary or starchy ones for six weeks, your body releases less insulin after eating—even though your blood sugar goes up the same—which might mean your pancreas isn’t working as well.

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Pro

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Against

Evidence from Studies

Supporting (1)

33

Community contributions welcome

33

Adverse effects on insulin secretion of replacing saturated fat with refined carbohydrate but not with monounsaturated fat: A randomized controlled trial in centrally obese subjects

Randomized Controlled Trial

Human

2016 Nov-Dec

This study found that when obese people swapped some saturated fat (like butter) for refined carbs (like white bread) for six weeks, their pancreas didn't release as much insulin as it should for the amount of sugar in their blood — meaning it got less efficient at doing its job.

Contradicting (0)

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No contradicting evidence found

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According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Adverse effects on insulin secretion of replacing saturated fat with refined carbohydrate but not with monounsaturated fat: A randomized controlled trial in centrally obese subjects

Score: 33

DOI: 10.1016/j.jacl.2016.09.006

Similar Assertions

If you swap out a small part of the fatty foods you eat—like butter or cheese—with healthier fats like olive oil or avocado for six weeks, it won’t hurt your body’s ability to manage blood sugar.

33

0

80%

After eating mostly fat for three days, the pancreas of healthy young men released less insulin right after they drank sugar water, even though their blood sugar went higher.

33

0

78%

If you're overweight around the middle and eat a meal full of carbs, your blood sugar and insulin spike more than if you ate a meal with lots of butter or olive oil—but your body doesn’t make as much insulin for how much sugar is in your blood.

33

0

75%

Even though obese people have higher blood sugar after eating carbs, their bodies still break down and use the sugar from those carbs just as well as lean people do.

37

0

70%