Ketones cause you to feel sick and can be a major culprit in eventually making you vomit.
Ketones are fatty acids produced by the liver when the body is starved of carbohydrate.
Once you have emptied your stomach of all its food you need to quickly get more carbohydrate and fluids into your system, or ketoacidosis will start to happen. Your body has no more energy so it has to find another form of fuel, hence the breakdown of fatty acids. Ketones can quickly start to poison your blood so you must start getting rid of them as soon as they are detected. Bayer diagnostics produce a simple test strip for ketones called Ketostix. The test ranges from Negative to Large amounts of Ketones in the body.