It's all about degree. Essentially what I'm talking about is severe dysregulation of lipid/protein metabolism that is generally only seen in type 1 diabetics, but it's the natural extension of extreme lipid and protein metabolism. I'm not familiar with that supplement, however.
As far as you watching yourself for it, don't worry, you'd notice being acidotic. I've seen it plenty of times at the hospital and you'd be huffing and puffing the acid off with terrible stomach pain and be generally having a bad day. While that supplement is associated with urine acetone increases, it's not quite the degree that I'm taking about.
Essentially, inhibiting fat production and storage and eliminating it result in very different effects. Insulin, by the way, is a very important mediator in fat production and storage. It's why so many new diagnosis type 1 diabetic children are often underweight.