Sugar Alcohol: Types, Effects, & Uses

Sugar alcohols are hydrogenated versions of homologous carbohydrates that are created by converting carbonyl groups into primary or secondary hydroxyl groups. Due to physical and chemical similarities in properties, the most notable of which is the lack of chromophores, they are difficult to evaluate. Analytical procedures for sugar alcohols, on the other hand, are largely identical to those used for carbs. For sugar alcohols assessments in various matrices, such as foods, pharmaceuticals, ecological, and biological samples, multiple analytical techniques are available. The types of samples and the analytical methods used for analysis determine how samples are cleaned for analysis. Let’s learn more about sugar alcohol and discuss some important questions.

Keywords: Alcohol, Mannitol, Industrial Chemistry, Xylitol, Diabetes, Sorbitol, Isomalt, Erythritol, Mannitol, Sugar, Hydrogenation

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What is Sugar Alcohol?

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Sorbitol, xylitol, isomalt, erythritol, mannitol, and hydrogenated starch hydrolysates are sugar alcohols that are often found in foods. Plant products such as grapes and berries contain sugar alcohols.

Sugar alcohols are found in nature, and mannitol was once derived from natural sources. They are now often synthesized through the hydrogenation of sugars and other methods. Sugar alcohols have little effect on tooth decay. Sugar alcohols, like sucrose, can alter blood sugar level, although only to a lesser extent. With the exception of erythritol, sugar alcohols can produce bloating and diarrhoea if ingested in large quantities.

Xylitol is made by hydrogenating xylose, a sugar that is converted from an aldehyde to a primary alcohol. Microbial activities, such as fermentative and biocatalytic processes in bacteria, fungus, and yeast cells, provide another way to make xylitol. These processes take use of xylose-intermediate fermentations to produce large yields of xylitol.

The majority of erythritol in the body is absorbed into the circulation in the small intestine and subsequently eliminated unchanged in the urine. Only about 10% make it to the colon. Because 90% of the erythritol is absorbed before it reaches the large intestine, it usually has little laxative effect. For large-scale erythritol manufacturing, chemical and fermentative techniques have been introduced. By using a nickel catalyst and a high-temperature chemical process, erythritol can be made from dialdehyde starch.

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General Chemical Structure of Sugar Alcohol

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The typical formula for sugar alcohols is HOCH₂(CHOH)nCH₂OH. Sugars, on the other hand, have two fewer hydrogen atoms, as in HOCH₂(CHOH)nCHO or HOCH₂(CHOH)n-1C(O)CH₂OH. The chain length of sugar alcohols varies. Because they are made up of pentoses (5-carbon sugars) and hexoses (6-carbon sugars), most have five or six carbon chains. Each carbon has one –OH group connected to it. The relative orientation (stereo-chemistry) of these –OH groups further distinguish them. Sugar alcohols, unlike sugars, do not tend to form rings. They can, however, be dehydrated to produce cyclic ethers, such as sorbitol to isosorbide.

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Characteristics of Sugar Alcohol

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The Sugar Alcohol has a following characteristics:

1. They are not as sweet as regular sugars and have fewer calories.
2. Oral bacteria are incapable of metabolising them.
3. They don't turn brown like regular sugars when heated.
4. Sugar alcohol dissolution is an endothermic process.
5. When consumed, they provide a cooling sensation.
6. They do not absorb entirely into the bloodstream. Their absorption is 50 percent slower than that of sugars.

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Health Effects of Sugar Alcohol

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Sugar alcohols provide a number of benefits over regular sugars. Because of their low-calorie content and sweet flavour, they are replacing sugar in food. Sugars induce tooth decay; however, sugar alcohols do not cause tooth decay because oral bacteria cannot metabolise them. Even the sugar alcohol xylitol helps to prevent tooth decay.

They are absorbed at a slower rate in the bloodstream than carbohydrates. As a result, they are ideal for diabetic individuals. Because they have a lower blood sugar impact. Sugar alcohols are used as sweeteners in many sweet foods produced for diabetic people. When taken in large numbers, unabsorbed sugar alcohols can cause diarrhoea and vomiting. Osmotic effects are to blame.

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Some Common Types of Sugar Alcohols

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1. Sorbitol (6-carbon): Some fruits naturally contain sorbitol. It is commonly made from dextrose, which is obtained from cornstarch, when utilised in food goods. Sorbitol has a sweetness level of about 60% that of normal sugar.
2. Mannitol (6-carbon): Strawberry, mushrooms, and onions are just a few examples of plants that contain mannitol. Cornstarch fructose can be used to make it. Mannitol is also about 60 percent sweeter than normal sugar.
3. Xylitol (5-carbon): Birch wood, corncobs, and residual sugar cane stalks are some of the ingredients that can be used to make xylitol. It's about as sweet as ordinary sugar and has a refreshing, minty flavour.
4. Erythritol (4-carbon): Erythritol is similarly made from cornstarch, but the process is different because it involves fermentation. It has around 70% of the sweetness of normal sugar.
5. Lactitol (12-carbon): Lactitol is a sugar substitute derived from whey that tastes around 35 percent sweeter than conventional sugar.
6. Maltitol (12-carbon): Maltitol is manufactured from corn-starch maltose. It tastes around 75% sweeter than ordinary sugar.
7. Isomalt (12-carbon): Although isomalt is manufactured from sugar, it only tastes around 55% sweet.

Other Types of Sugar Alcohols

1. Glycerol (3-carbon)
2. Threitol (4-carbon)
3. Arabitol (5-carbon)
4. Ribitol (5-carbon)
5. Galactitol (6-carbon)
6. Fucitol (6-carbon)
7. Iditol (6-carbon)
8. Inositol (6-carbon; a cyclic sugar alcohol)
9. Volemitol (7-carbon)
10. Maltotriitol (18-carbon)
11. Maltotetraitol (24-carbon)
12. Polyglycitol

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Synthesis of Sugar Alcohol

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The reduction of a sugar derivative is commonly used in the production of sugar alcohols. A sugar ketal is the most frequent sugar derivative utilised in the production of sugar alcohols. A sugar ketal is a molecule with a ketone group and even a hydroxyl group on the same carbon atom. A sugar molecule has both a ketone group and a hydroxyl group.

The addition of the hydrogen atom to a ketone group results in the reduction of a sugar ketal. A sugar alcohol is formed when a hydrogen atom is added. A reduction reaction occurs when a hydrogen atom is added to the ketone group.

The following stages are usually followed for making a sugar alcohol:

1. Sugar ketal is converted into sugar alcohol.
2. Purification of the sugar alcohol
3. A sugar derivative is made from the sugar alcohol.

• Sugar Alcohol as Food Additives

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Uses of Sugar Alcohol

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1. Sugar alcohols are employed in a variety of industries, including food and pharmaceuticals. A few of its applications are given below:
2. As food additives, they are frequently utilised. They have a sweet taste and produce fewer calories.
3. Many sweeteners employ them to mask their aftertaste.
4. They do not cause dental and can potentially assist prevent it.
5. Diabetic patients frequently include them into sweet foods.
6. They're found in drugs that deal with eight management.
7. Because they have a low glycaemic index (GI), they aid with blood sugar control.
8. Xylitol has been shown to prevent osteoporosis in rats in numerous trials. It enhances the volume and mineral content of the bones.
9. Xylitol can assist to improve the health of your skin by increasing collagen production.
10. Baked goods, chewable vitamins, candies, cough syrups, frostings, mouthwashes, ice creams and toothpastes all contain sugar alcohols.

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Things to Remember

• Sugar alcohols are chemical molecules that are commonly generated from sugars; contrary to popular belief, sugar alcohols are neither sugars nor alcoholic beverages.
• They're white, water-soluble solids that can be found in nature or made industrially from sugars.
• They're commonly used as sweeteners and thickeners in the food business.
• Sugar alcohols are inefficiently taken into the bloodstream from the small intestine, resulting in a smaller change in the blood glucose than "normal" sugar (sucrose).
• They are a common sweetener among diabetics but also people on low-carbohydrate diets because of their features.
• Overconsumption of sugar alcohols, like many other incompletely digested drugs, can cause bloating, diarrhoea, and flatulence since they're not taken in the small intestine.

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