As Dr. Daniel Mowrey reported: "More elaborate safety tests were performed by the Japanese during their evaluation of Stevia as a possible sweetening agent. Few substances have ever yielded such consistently negative results in toxicity trial as has Stevia. Almost every toxicity test imaginable has been performed on Stevia extract (concentrate) 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."
Numerous studies have been done worldwide on the safety of Stevia rebaudiana, all with positive results. It has been shown to regulate blood glucose levels, “safe for diabetics”, non cancer producing, alleviates hypertension.
Studies at Hiroshima University School of Dentistry and the Purdue University Dental Research team, Stevia has been found to retard plaque on teeth and suppress antibacterial growth.
Since Dr. Rebaudi started his studies of Stevia in 1900, many more studies followed. Noteworthy among them are findings by Kober in 1915, and Pomaret & Lavielle in 1935 and the list continues.
Of very special significance is the fact that numerous toxicological studies have consistently demonstrated the safety of Stevioside for human use.
“In its 69rd meeting of the Joint FAO/WHO Expert committee on Food Additives (JECFA) determined the NOEL (No Observed Effect Level) for Steviol Glycosides (Stevioside & Rebaudioside) to be 970 mg/kg body weight per day as determined in a long term study. ”