Have anyone experienced "strange" ketones?
....
Anyone had similar experiences?
Yes. We have and don't be too worried about it either! ;o)
From your description with your daughter, it certainly doesn't appear to be ketones in the urine because of poor blood sugar control. And that is important to conclude first, as ketones in the urine are not necessarily bad on their own. They are merely the observed symptom of the real problem, namely too high a blood sugar. But anyway, let that rest, as it wasn't the case...
The presence of ketones combined with a normal blood sugar is not necessarily a cause for concern. Ketones in the urine are a sign that your body is using fat as energy source instead of using sugar. This may be because not enough insulin is available to take the glucose from the blood stream to the cells to use for energy. So while you can have a normal blood sugar, if you at the same time have a very low level of free flowing insulin, then the fat is burned off instead and you will see ketones in your urine. And taking just a bit of insulin might therefore also stop the ketones, as the glucose metabolism will be reestablished.
Some of our low carber diabetics on this forum and also 'normal people' that don't have diabetes can have ketones in their urine. This can occur if you do extreme exercise (especially the endurance kind), is fasting (not eating), or is following a low-carbohydrate diet. This is called ketosis and it is a normal response to 'starvation'.
Nothing wrong with some fat burning, as long as however you ensure your body still have a relevant insulin supply, as ketosis can become dangerous if it occurs due to an extended period of lack of insulin. Reason being the ketones lower the pH of the blood, which in itself can lead to a life-threatening situation. So e.g. also our low-carb Type1 friends on this forum still take basal insulin to keep the machine in a good healthy state.
PS: Btw, also good for the body to drink some extra water in such case, to help it flush out the ketones. (to counter the low pH levels)