My father spent most of a decade running a company developing a non-invasive blood sugar meter: http://www.diabetesnet.com/diabetes-technology/meters-monitors/f

My father spent most of a decade running a company developing a non-invasive blood sugar meter: http://www.diabetesnet.com/diabetes-technology/meters-monitors/future-meters-monitors/solianis-monitoring-ag http://www.diabetesnet.com/diabetes-technology/meters-monito... After many years of struggle, the company folded from a lack of investment: medicine investors were scared off by the tech component, and tech investors didn't understand that in medicine, you have to prove, with studies, that your treatment or device actually works. This takes time, and frequent trips back to the drawing board.