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Natural Sweeteners

    Stevia Extract

    Specification:

    Stevioside:80%~~99% by HPLC
    Rebaudioside-A:40%~~98% by HPLC

Stevia Extract(Natural Sweetners)

Stevia is a genus of about 240 species of herbs and shrubs in the sunflower family (Asteraceae), native to subtropical and tropical regions from western North America to South America. Human use of the sweet species Stevia rebaudiana Bertoni is originated in South America.The species S. rebaudiana, commonly known as sweetleaf, sweet leaf, sugarleaf, or simply stevia, is widely grown for its sweet leaves. Today, stevia is cultivated and used in food elsewhere in east Asia, including in China (since 1984), Korea, Chinese Taiwan, Thailand, and Malaysia. It can also be found in Saint Kitts and Nevis, in parts of South America (Brazil, Colombia, Peru, Paraguay, and Uruguay) and in Israel. China is the world's largest exporter of stevioside and rebaudioside A.




The leaves of the stevia plant have 30–45 times the sweetness of sucrose (ordinary table sugar). The leaves can be eaten fresh, or put in teas and foods. As a sweetener and sugar substitute, stevia's taste has a slower onset and longer duration than that of sugar, although some of its extracts may have a bitter or licorice-like aftertaste at high concentrations, however its extracts of pure or high purity of Rebaudioside A is of the least bitter.
Steviol is the basic building block of stevia's sweet glycosides: Stevioside and rebaudioside are constructed by replacing the bottom hydrogen atom with glucose and the top hydrogen atom with two or three linked glucose groups, respectively.
Extraction of sweet compounds

In terms of weight fraction, the four major steviol glycosides found in the stevia plant tissue are:

• 5–10% stevioside (250–300X of sugar)
• 2–4% rebaudioside A — most sweet (350–450X of sugar) and least bitter
• 1–2% rebaudioside C
• ½–1% dulcoside A.

Application
a.Applied in the food field, it is mainly used as a non-calorie food sweetener.
b.Applied in pharmaceutical field, stevioside is approved to use in medicine in 1992, and developing many new products in few years.
c.Applied in other products, such as beverage, liquor, meat, daily products and so on.
d. As a kind of condiment, it also can play a preservative role to extend shelf-life.