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Title: Alternative Sweeteners

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7<br />

Tagatose<br />

Hans Bertelsen and Søren Juhl Hansen<br />

Arla Foods Ingredients amba, Videbaek, Denmark<br />

Rene Soegaard Laursen<br />

Arla Foods Ingredients amba, Brabrand, Denmark<br />

James Saunders<br />

Biospherics Incorporated, Beltsville, Maryland<br />

Kristian Eriknauer<br />

Arla Foods Ingredients amba, Viby, Denmark<br />

I. INTRODUCTION<br />

d-tagatose is a low-calorie bulk sweetener with the following properties:<br />

• It has 92% of the sweetness of sucrose.<br />

• It has a reduced caloric value.<br />

• It is noncariogenic.<br />

• It is a prebiotic.<br />

• It is a flavor enhancer.<br />

d-Tagatose or tagatose is a ketohexose in which its fourth carbon is chiral and<br />

is a mirror image of the respective carbon atom of the common d-sugar, fructose.<br />

The CAS number for d-tagatose is 87-81-0. The empirical formula for d-tagatose<br />

is C 6H 12O 6. The molecular weight of d-tagatose is 180.16. The structural formula<br />

for d-tagatose is depicted in Fig. 1, along with that of d-fructose. Tagatose is a<br />

naturally occurring low-calorie bulk sweetener. Tagatose occurs in Sterculia setigera<br />

gum, a partially acetylated acidic polysaccharide (1). d-Tagatose is also<br />

found in heated cow’s milk, produced from lactose (2) and occurs in various<br />

other dairy products.<br />

105

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