daughter has question
 

She's cutting back on carbs and knows she is in ketosis - she had a slice of pizza last night and today it still shows ketones. How long (approximately)from the time you eat something to the time it will show up in urine?

well the sticks arent that accurate - but if it was going to, it would have knocked her out by now. Maybe she didnt eat enough carbs to kick her out.

Or it could just take until tomorrow. As moonwalker said, the stix aren't that accurate and they do also show the effects of burning dietary fat as well as stored fat.