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Several possible studies

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Where Does Fat Go When You Lose Weight? The Answer May Surprise You (opens in a new tab)

scitechdaily.com · 2026-09-25

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Short answer

Several possible studies

No clear answer.

More than one paper fits the article's details, and none fits well enough to single out. Checking claims against the wrong study would be worse than not checking them at all.

Checked against the study summary. The full text wasn't available, so some details couldn't be settled either way.

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Several studies could be the source of this story.

More than one paper fits the article's details, and none fits well enough to single out. Checking claims against the wrong study would be worse than not checking them at all.

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Several studies could fit.

More than one paper fits the article's details, and none fits well enough to single out. Checking claims against the wrong study would be worse than not checking them at all.

Source paper

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The 4 papers the story cites

Source study separated from background citations.

The research anchor for the report.

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The papers it could be

Nearby papers when the source is unclear.

and 15 more considered

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What the story asserts. With no source study, there is nothing to check these against.

Claim 1 of 4Not checkedThe surprising final step of fat loss happens in the lungs, where most burned fat appears to leave as carbon dioxide.View evidenceHide evidence

As statedmost burned fat

Not checked

NewsLink could not identify one source study, so this claim was not compared against a paper.

Claim 2 of 4Not checkedWhen the body is in a calorie deficit, it relies on stored fat; triglycerides in fat cells are broken down during lipolysis and then used in beta-oxidation to produce energy.View evidenceHide evidence

Not checked

NewsLink could not identify one source study, so this claim was not compared against a paper.

Claim 3 of 4Not checkedAs a consequence of beta-oxidation and carbon dioxide production, we end up breathing out the majority of the fat we lose during weight loss, with a lesser proportion lost as water in sweat.View evidenceHide evidence

As statedthe majority

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NewsLink could not identify one source study, so this claim was not compared against a paper.

Claim 4 of 4Not checkedSome researchers have suggested that around 84% of fat loss is exhaled as carbon dioxide and 16% is excreted as water via sweat, although the exact proportions are difficult to estimate directly.View evidenceHide evidence

As statedaround 84% ... 16%

Not checked

NewsLink could not identify one source study, so this claim was not compared against a paper.

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No single source study was found.

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No exact source, but these papers are close.

Crossref, PubMed, Europe PMC · 19 candidate papers

And 14 more candidates considered.