Your breath reveals when your body burns fat
When the body runs low on carbohydrates, it converts fat into ketones and releases a specific byproduct called acetone through the lungs.
The human body is constantly switching between fuel sources based on activity and diet. When carbohydrate supplies are exhausted, the metabolism shifts toward burning fat for energy. This process triggers the production of molecules called ketones, which eventually release a byproduct known as acetone. Because acetone is highly volatile, it passes from the bloodstream into the lungs and is expelled every time you exhale.
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