A glucose level below 3.0mmol/l indicates hypoglycaemia.
Some people experience symptoms when their blood sugar level is higher than this ? eg at 4.0mmol/l. (Therefore 'four is the floor' for blood glucose levels.)
Hypos can't be detected with urine tests for glucose.
****************************************************************************************
Adrienne, it seems we are both wrong! So a hypo is 3 or under, but they say its 4 to be on the safe side! I wish there werent so many contradictions with diabetes care- it seems different consultants tell us different things - so its pot luck!

Bev
Hi
I can't agree with this at all in the slightest. These glucometers we use are not brilliant at low levels and are all slightly 'out'. So a reading of 3.0 could actually mean a true reading of 2.6 or 3.5. This is the problem. The One Touch meters always come out on top as being the most accurate but you just don't know. You cannot wait until 3.0 to call it a hypo, this website is wrong. A hypo or low is under 4.0. For a non diabetic a reading of 3.0 is just about passable but I would be worried at that as well if it was reoccurring.
I have read the link you posted and I also don't agree with another bit this bloke has written :
"How is hypoglycaemia treated?
Mild hypoglycaemia is treated by drinking or eating about 10-20g sugar, eg in the form of sweetened juice, milk or glucose tablets.
In the case of a more serious hypo, an ambulance should be called. The paramedic will then give glucose intravenously or glucagon (GlucaGen) (a glucose-increasing hormone) is injected into a muscle, or into the fatty tissue under the skin."
Where in any of that are the rules that should be followed. He seems to have missed out a normal hypo ie one where you treat it with lucozade or coke or any other quick acting sugar. Milk is rubbish as hypo treatment, it isn't quick enough unless you mix Maxijul with it. For many fruit juice is also not quick enough. He is saying that I presume 3.0 to 4.0 is milk and so milk or whatever is ok and anything under 3.0 is classed as severe and an ambulance needs to be called and glucagon administered. Oh dear.
Anyone can give glucagon, you don't need to call an ambulance to do that. If you use the glucagon you should then call and ambulance as vomitting and more hypos can follow and you cannot use glucagon again until the liver replenishes ie minimum of 24 hours later.
I just think these things are so misleading.
A hypo is under 4.0. You can get mild hypos which is the ones I mentioned before where you learn work out how much quick acting you actually need ie half a small can of coke or 2 glucose tablets. You can get the worse hypos, ie lower than 3.5 where you need more coke or whatever and then you can get the hypos where fits happen. Fits are not always jerky things. My daughter always used to have the still, staring fits as if passing in and out of a coma, they are all still fits. I was lucky and could use coke. I did have to use the glucagon once last year.
Sorry to disagree again Bev, there is too much conflicting evidence out there from professionals. 4.0 and under is a hypo for a diabetic person.
Take care