Based on Steves posts it looks like it is actually possible to detect if a person is in a ketose state or not by analyzing that persons breath. But what are the signs of ketosis?
After doing some researching on Wikipedia I concluded that what we are looking for is acetone.
| Properties | |
|---|---|
| Molecular formula | C3H6O |
| Molar mass | 58.08 g mol−1 |
| Appearance | Colorless liquid |
| Odor | Pungent, irritating, floral |
| Density | 0.791 g cm−3 |
| Melting point | -95–93 °C, 178-180 K, -139–136 °F |
| Boiling point | 56-57 °C, 329-330 K, 133-134 °F |
| log P | -0.042 |
| Vapor pressure | 24.46–24.60 kPa (at 20 °C) |
| Acidity (pKa) | 24.2 |
| Basicity (pKb) | -10.2 |
| Refractive index (nD) | 1.35900 |
| Viscosity | 0.3075 cP |
From the Wiki page about Ketone Bodies
Ketone bodies are three water-soluble compounds that are produced as by-products when fatty acids are broken down for energy in the liver. Two of the three are used as a source of energy in the heart and brain while the third (acetone) is a waste product excreted from the body. In the brain, they are a vital source of energy during fasting.[1] Although termed ”bodies”, they are dissolved substances, not particles.
The three endogenous ketone bodies are acetone, acetoacetic acid, and beta-hydroxybutyric acid,[2] although beta-hydroxybutyric acid is not technically a ketone but a carboxylic acid. Other ketone bodies such as beta-ketopentanoate and beta-hydroxypentanoate may be created as a result of the metabolism of synthetic triglycerides such as triheptanoin.d
Individuals who follow a low-carbohydrate diet will also develop ketosis, sometimes called nutritional ketosis, but the level of ketone body concentrations are on the order of 0.5-5 mM whereas the pathological ketoacidosis is 15-25 mM.
From the Wiki page about Ketosis
The ketone body acetoacetate will slowly decarboxylate into acetone, a volatile compound that is both metabolized as an energy source and lost in the breath and urine.
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