Parts Used & Where Grown
The stevia plant originally came from the rain forests of Brazil and Paraguay. It is now grown in those areas, as well as in Japan, Korea, Thailand, and China. It is most widely used as a non-sugar sweetener in food and drink, particularly because it does not appear to have any calories or affect on blood sugar like most natural sweeteners (like sugar or honey). The leaf is used in herbal preparations.
Traditional Use (May Not Be Supported by Scientific Studies)
The native peoples in South America used stevia primarily as a sweetener, a practice adopted by European colonists. The indigenous tribes also used stevia to treat diabetes.1 During World War II, stevia was grown in England as a sugar substitute. The greatest use of stevia as a sweetener today can be found in Japan.
How It Works
How It Works
Various glycosides, particularly stevoside, give stevia its sweetness. Stevoside is between 100 and 200 times sweeter than sugar. Early reports suggested that stevia might reduce blood sugar (and therefore potentially help with diabetes),2 although this has not been confirmed in all reports.3
How to Use It
Less than 1 gram per day can be used effectively as a sweetener. Usually, the powdered herb is added directly to tea or to food.
Interactions with Supplements, Foods, & Other Compounds
Interactions with Medicines
Extensive reviews of human and animal data indicate stevia to be safe.4 Stevia accounts for nearly 40% of the sweetener market in Japan and is commonly used in various parts of South America.5
1. Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Foods, Drugs, and Cosmetics, 2d ed. New York: John Wiley & Sons, 1996, 478–80.
2. Curi R, Alvarez M, Bazotte RB, et al. Effect of Stevia rebaudiana on glucose tolerance in normal adult humans. Braz J Med Biol Res 1986;19:771–4.
3. White JR Jr, Kramer J, Campbell RK, Bernstein R. Oral use of a topical preparation containing an extract of Stevia rebaudiana and the chrysanthemum flower in the management of hyperglycemia. Diabetes Care 1994;17:940.
4. Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Foods, Drugs, and Cosmetics, 2d ed. New York: John Wiley & Sons, 1996, 478–80.
5. Blumenthal M. FDA rejects AHPA stevia petition. Whole Foods 1994:Apr;61–4.
Last Review: 08-17-2011
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