The thing about a glucose tolerance test is not so much how far the BG goes up, but how quickly it comes down again. The glucose in lucozade is absorbed extremely quickly (it is mostly in the form of pure glucose, already in solution and the CO2 speeds absorption). This means that it will spike anyone's BG - diabetic or not. In a non-diabetic, the insulin response will cut in after an hour or so and will rapidly restore the BG to the starting point. In a diabetic the BG will possibly rise higher, but more importantly it will stay high for longer. That is why for a formal GTT the delay before taking the second sample is always two hours - that is when the difference between diabetics and non-diabetics is greatest. Also, as Eddie pointed out, other illness can easily make a difference - so it really is impossible to interpret this. Don't panic, but do get your daughter checked out by a doctor. If she isn't diabetic then you need to put your mind at rest, if she is - well it is better off, for everyone's sake, that you find out as soon as possible.