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Title: Alternative Sweeteners

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534 Deis<br />

Table 4 General Categories of Fat-based Fat Replacers<br />

Emulsifiers<br />

Molecular backbones to which fatty acids are attached in such a way that digestion is<br />

altered, but functional properties are retained (e.g., Olestra)<br />

Glycerol backbones to which groups with poor digestibility are attached (e.g.,<br />

Caprenin, Salatrim)<br />

esterified to triglycerides, then imported into chylomicrons, which enter the lymphatic<br />

system. MCTs bypass the lymphatic system. They are hydrolyzed to MC<br />

fatty acids, which are transported by way of the portal vein directly to the liver,<br />

where they are oxidized for energy. They are not likely to be stored in adipose<br />

tissue. For enteral and parenteral feeding, their advantage is already known.<br />

MCTs provide patients with an energy source similar to glucose, but with twice<br />

the caloric value.<br />

The group of fat replacers with the most consumer consciousness at this<br />

time are the synthetically structured fats (33, 34). In any discussion of fat substitutes,<br />

these hold the most interest because they are designed to look and act like<br />

fats, but they contribute fewer calories and less fat. Two approaches to this have<br />

been taken: (a) work from a glycerol backbone and attach planned ratios of longchain<br />

(LC) saturated fatty acids with very low caloric density and shorter-chain<br />

(SC) fatty acids with slightly lower caloric density than LC fatty acids (caprenin,<br />

salatrim); or (b) attach fatty acids to a nonglycerol backbone in such a manner<br />

that the molecule is poorly absorbed in the body (olestra). Because the first<br />

method results in a triglyceride similar to what could be found in nature, the<br />

regulatory route is far shorter: Have it reviewed by an expert panel, file a GRAS<br />

petition, and commercialize. The second route is a little more complex. A full<br />

food additive petition is required and because of the amount of fat that could<br />

Table 5 Functional Properties of Emulsifiers<br />

Increase water content<br />

Aeration to reduce density<br />

Use fats more efficiently<br />

Improved processing<br />

Stabilize emulsions<br />

Release agent<br />

Starch, protein interactions

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