Some studies say eating aspartame doesn’t mess up your metabolism, but the studies aren’t very strong or many — they just watched people instead of testing them in controlled experiments.

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Evidence from Studies

Supporting (1)

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Community contributions welcome

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Aspartame Metabolism in Normal Adults, Phenylketonuric Heterozygotes, and Diabetic Subjects

Narrative Review

Human

1989 Jan

This study checked what happens in people’s bodies after they consume aspartame and found no harmful changes in blood chemicals, so it supports the idea that aspartame is safe — but it also admits we don’t have a lot of data, which matches the claim.

Contradicting (0)

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No contradicting evidence found

Gold Standard Evidence Needed

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

Aspartame Metabolism in Normal Adults, Phenylketonuric Heterozygotes, and Diabetic Subjects

Score: 1

DOI: 10.2337/diacare.12.1.67

Similar Assertions

Eating or drinking things with aspartame doesn’t seem to raise or lower blood sugar, insulin, or fat levels in people with diabetes, according to some small studies.

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74%

People who eat or drink things with aspartame (like diet soda) might be more likely to get cancer or stroke, based on a big study of over 100,000 French adults followed for about 8 years.

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The safe amount of aspartame set for everyone might be too high for some people—like kids or those with certain health conditions—because their bodies might react differently to it.

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72%