Testing blood glucose has gotten a lot easier these days. Blood glucose meters, or glucometers, require a tiny bit of blood to be applied on a testing strip, and compute the results in five seconds. However, the cost of testing strips makes it very difficult for most diabetics to test often. Ideally, a diabetic must test before a meal, and two hours after. Type 1 diabetics, who develop the disease because of an auto-immune reaction, must also test before, during and after intense physical activity. With test strips costing about $1 each, a majority of diabetics cannot test more than 4 times a day. Health insurance companies also don't approve more than 100 strips a month, with some approving 200 strips a month. Very few health insurance companies cover testing supplies to support testing 10 to 12 times a day. Diabetics end up spending out of pocket to ensure that they can test 8 to 12 times a day, if not more. The blood glucose meter/testing strip companies use the "Gillette" model to rake in the profits. They pretty much give away the meter, and make a ton of money on the strips, much like Gillette does with its razors and blades.
There is no cure for diabetes, yet.