Virtually all scientific researchers who have studied stevia and stevioside have attested to their complete safety. Almost every toxicity test imaginable has been performed on stevia extract or stevioside at one time or another. The results are always negative. No abnormalities in weight change, food intake, cell or membrane characteristics, enzyme and substrate utilization or chromosome characteristics. No cancer, no birth defects, no acute and no chronic untoward effects.
Stevia is here.
Use it, recommend it, sell it and enjoy it. Bracht, A.K., Alvarez. M. and Bracht. Biochemical Pharmacology . Laboratory analyses performed by BBC Laboratory, Tempe, Ariz. and ANR Laboratory, Phoenix, Ariz. 4.