this post was submitted on 25 Jul 2026

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Breathalyser can tell if you are burning fat from a single exhalation (www.nature.com)

submitted 3 days ago by Wurzl@lemmy.zip to c/science@lemmy.world

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[–] jet@hackertalks.com 3 points 3 days ago* (last edited 3 days ago)

Only some people and usually only during their adaption window, after a few weeks they don't stand out.

In fact it's exactly this adaption effect that makes this breath devices not reliable for long term adapter people. I.e. our bodies don't love throwing energy away for free, the body doesn't want to make ketones just to breath them away... Efficiency goes up over time and you stop breathing them out, stop peeing them out, etc.