I use this in my coffee. I can't tell it's not sugar by the taste.
Though stevia is most likely as safe as artificial sweeteners (or more so), few long-term studies have been done to document its health effects in humans. A review conducted by toxicologists at UCLA, which was commissioned by nutrition advocate Center for Science in the Public Interest (
Kobylewski & Eckhert, 2008), raised concerns that stevia could contribute to cancer. The authors noted that in some test tube and animal studies, stevioside (but not rebaudioside A) caused genetic mutations, chromosome damage and DNA breakage. These changes presumably could contribute to malignancy, though no one has actually studied if these compounds cause cancer in animal models. Notably, initial concerns that stevia may reduce fertility or worsen diabetes seem to have been put to rest after a few good studies showed no negative outcomes. In fact, one study of human subjects showed that treatment with stevia may improve glucose tolerance. Another found that stevia may induce the pancreas to release insulin, thus potentially serving as a treatment for type 2 diabetes. (
These studies are reviewed in Goyal, Samsher and Goyal, 2010.) After artificial sweeteners were banned in Japan more than 40 years ago, the Japanese began to sweeten their foods with stevia. And while they have conducted more than 40,000 clinical studies on stevia and concluded that it is safe for human use, there is a general lack of long-term studies on stevia’s use and effects.All in all, stevia’s sweet taste and all-natural origins make it a popular sugar substitute. With little long-term outcomes data available on the plant extract, it is possible that stevia in large quantities could have harmful effects. However, it seems safe to say that when consumed in reasonable amounts, stevia may be an exceptional natural plant-based sugar substitute. Check the label next time you eat a favorite low-calorie sweet. You’re likely to find stevia near the top of the ingredient list.