Healbe had an amazingly successful Indiegogo campaign and the GoBe's claims are amazing. The problem is, as this article points out, those claims are probably false and consumers were probably just tricked into buying snake oil.
The problem is, MacDonald explains, the three main nutrients that determine caloric intake are carbohydrates, protein and fats. Glucose provides only a small part of the picture. A company that invented a non-invasive way to measure glucose would be a huge hit with the treatment of diabetes. Currently, diabetes sufferers have to prick their skin and make themselves bleed. The technology is probably coming soon, MacDonald says, but when it does it will be the size of a shoebox. It will also likely involve some form of infrared light shone through the skin that will measure the fluid in interstitial cells to approximate the blood glucose level in a simple milligrams per deciliter figure. It will come from a big lab, will be huge news and make a lot of money.