**Question:** Non-caloric sweetener is:

A. Aspartame
B. Stevia
C. Saccharin
D. Cyclamate

**Core Concept:** Non-caloric sweeteners are sugar substitutes with a sweet taste but without providing significant calories (4 kcal/g) to the diet. These substances are used to reduce the sugar content in food and beverages while preserving taste.

**Why the Correct Answer is Right:**
Non-caloric sweeteners are man-made compounds that mimic the sweet taste of sugar (glucose) without the energy contribution. Among the given options, **Aspartame (A)**, **Stevia (B)**, and **Saccharin (C)** are examples of non-caloric sweeteners. These substances are used as alternatives to sugar in various products, particularly for those seeking to control calorie intake or blood sugar levels.

**Why Each Wrong Option is Incorrect:**

**Option D: Cyclamate** is another sweetener, but it is not a non-caloric sweetener. Cyclamate provides around 3 kcal/g, which is significantly lower than sugar but still contributes calories. This distinction makes Cyclamate incorrect in this context.

**Clinical Pearl:** Non-caloric sweeteners are generally safe for most individuals, but their long-term effects on health are still under investigation. They may play a role in weight management, blood sugar control, and reduced dental caries risk. However, excessive consumption can lead to gastrointestinal issues and headaches due to the absence of sugar, which the body may perceive as a deficiency.

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**Correct Answer:** **Aspartame (A)** is the correct non-caloric sweetener. Aspartame is an artificial compound derived from two amino acids: aspartic acid and phenylalanine. It is commonly used in diet sodas, baked goods, and other food products as a sugar alternative. Other non-caloric sweeteners include:

1. Stevia (B): Extracted from the leaves of the Stevia rebaudiana plant, Stevia is a natural sweetener that is up to 300-400 times sweeter than sugar, with no significant caloric content. Stevia is often used as a sugar substitute in products like beverages, baked goods, and dietary supplements.
2. Saccharin (C): A synthetic compound, Saccharin is about 300 times sweeter than sugar and does not contribute calories. It is widely used in foods and beverages to reduce sugar content and improve taste.

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**Why Aspartame is Right and Other Options are Wrong:**

Aspartame is a non-caloric sweetener, with a molecular structure that closely mimics that of aspartic acid and phenylalanine, two essential amino acids. This allows aspartame to provide sweetness without adding calories. In contrast, the other options (Stevia, Saccharin, and Cyclamate) are also non-caloric sweeteners but are different from aspartame in terms of their chemical structure, efficacy, and potential side effects.

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