I disagree...even natural things can be unhealthy when they are (a) chemically altered and processed (as the food industry does to everything) or (b) consumed in ever increasing amounts (as Americans do with sugar and artificial sweeteners).
My thoughts on stevia are that in its pure, unprocessed form it's fine. Use a little once a day to sweeten your tea or coffee...no big deal!
But what if you start buying (and consuming) orange juice, soda, and other beverages sweetened with it (which are already available)...and then what happens when the food industry starts putting stevia in yogurt, cereal, ice cream, cookies, etc?
I don't really know...but my philosophy with all things food related is "a little of everything, a lot of nothing". Eat a wide variety of foods/beverages, but not too much of any one thing. Use stevia occasionally if you like the way it tastes, but don't substitute it for all things sweet. Use sugar occasionally too, just don't pile it on!
And honestly, if you are worried about getting too many calories from sugary things...eat less of them! Calorie-free sweeteners are like a band-aid for the real problem...Americans eat too much sugar, usually in the form of high-calorie, refined/processed junk food. So is the same junk food minus the sugar plus stevia any healthier? NO!
And seriously...if you can't afford (nutritionally speaking) to drink ORANGE JUICE (which has NO added sugar...it's just the juice from oranges), and feel the need to switch to Trop50 (the new OJ with 50% less cals and sugar - sweetened with stevia of course!), you need to re-evaluate your diet.
This post was inspired by something I read recently by Marion Nestle...this woman knows the food industry! Here's an excerpt from what she wrote: