Artificial Sweeteners

Introduction

Artificial Sweetener

  • Definition: Artificial sweeteners are food additives that replicate the sweetness of sugar.

  • Purpose: They are commonly chosen by consumers seeking sweetness without additional calories.

  • Characteristics: Known as sugar substitutes due to their ability to mimic sugar's effect on taste.

How Artificial Sweetening Works

  • Composition of Sugar: Sucrose (C₁₂H₂₂O₁₁) is the primary sugar derived from natural sources like cane sugar, often deemed unhealthy in high amounts.

  • Health Benefits: Sucrose substitutes play crucial roles in managing body weight, controlling diabetes, and promoting oral health.

  • Types of Artificial Sweeteners: Classified into two categories—nutritive and non-nutritive.

Nutritive Sweeteners

  • Sugar Alcohols:

    • Classified as nutritive sugar substitutes providing calories upon consumption.

    • They can be labeled as sugar-free by replacing full-calorie sugars.

  • Sweetness Range: Sugar alcohols range from 25% to 100% sweetness compared to table sugar (sucrose).

Types of Nutritive Sweeteners

  • Sorbitol

    • Sources: Occurs naturally in fruits such as cherries, plums, and apples.

    • Properties: Moderately sweet (60% as sweet as sugar), hygroscopic, poor shelf life due to water retention.

    • Uses: Serves as a humectant and is soluble in water.

  • Xylitol

    • Source: Derived from xylan-containing plants.

    • Sweetness: Equally sweet as sucrose with a cooling effect.

    • Health Benefit: Prevents dental plaque accumulation.

  • Mannitol

    • Production: Made by hydrogenating fructose.

    • Function: Uses include preventing moisture absorption in products, maintaining consistency in chewing gum.

  • Erythritol

    • Natural Occurrence: Found extensively in nature and fermentable by yeast.

    • Sweetness Level: 70-80% that of sucrose.

  • Isomalt (Palatinit)

    • Sweetness: Approximately 45% that of sucrose, fermented in the large intestine.

  • Maltitol

    • Appearance: White, odorless, anhydrous crystalline powder.

    • Sweetness: Ranges between 75-80% relative to sucrose.

  • Hydrogenated Glucose Syrup (Lycasin)

    • Composition: Contains a mixture of sorbitol, maltitol, maltotritol, and polysaccharide alcohols.

Limitations of Nutritive Sweeteners

  • Absorption Issues: Sugar alcohols provide fewer calories as they are not fully absorbed in the body, potentially causing gas and diarrhea if consumed in excess.

  • Labeling Requirement: Products containing sorbitol or mannitol must have warning labels due to possible digestive side effects.

Non-Nutritive Sweeteners

  • Definition: Low-calorie sweeteners added to provide sweetness without calories.

  • Characteristics: Generally much sweeter than sucrose, used in minuscule quantities.

Key Non-Nutritive Sweeteners

  • Saccharin

    • Sweetness: 300-500 times sweeter than sucrose.

    • Drawback: Bitter metallic aftertaste at high concentrations.

  • Aspartame

    • Overview: An odorless, sweet-tasting crystalline powder unstable at extreme pH levels.

    • Health Concern: Potentially harmful for individuals with Phenylketonuria (PKU) due to its phenylalanine component.

  • Neotame

    • Sweetness: Approximately 7,000-8,000 times sweeter than sugar, up to 13,000 times reported.

  • Sucralose

    • Overview: Newest non-nutritive sweetener; 600 times sweeter than table sugar, provides no calories.

  • Acesulfame-K

    • Usage: Approved since 1988, often unbeknownst to consumers, 200 times sweeter than sucrose, and used as a flavor enhancer.

Recap and Conclusion

  • Key Takeaway: Artificial sweeteners provide various options for achieving sweetness without additional calories, but each type has unique properties, applications, and potential health considerations.