Step 1: Understanding the Concept:
Polyols, also known as sugar alcohols, are hydrogenated carbohydrates used as low-calorie bulk sweeteners in food formulation.
They provide sweetness and bulk structure similar to sucrose, but with fewer calories and a lower glycemic response.
Step 2: Detailed Explanation:
Let us analyze the options based on their classification and sweetness:
- Xylitol: A five-carbon sugar alcohol (polyol) derived from xylan.
It is the sweetest of all common polyols, with a relative sweetness of 1.0 (equal to sucrose and glucose).
Additionally, it has a very low glycemic index of 7 (compared to glucose, which has a baseline of 100), making it highly suitable for diabetic food products.
Xylitol also produces a distinct cooling sensation in the mouth due to its endothermic heat of solution.
- Sucralose, Neotame, and Aspartame: These are high-intensity artificial sweeteners, not polyols.
They are hundreds to thousands of times sweeter than sucrose and do not provide the bulk texture of sugar alcohols.
Therefore, Xylitol is the sweetest polyol among the options.
Step 3: Final Answer:
The sweetest polyol with a relative sweetness equal to glucose and a glycemic index of 7 is Xylitol, which corresponds to Option (A).