Which of the following is NOT a class of nutrients?

The reasoning behind identifying sugars as not being a class of nutrients lies in the distinction between the various classifications of nutrients. Nutrients are generally categorized into specific classes that include macronutrients—proteins, carbohydrates, and fats—and micronutrients, which encompass vitamins and minerals.

While sugars are indeed a form of carbohydrate and can provide energy, they do not represent a separate class of nutrients on their own. Instead, they fall under the broader category of carbohydrates. The classification system is designed this way to help understand the functions and sources of various nutrients more clearly.

On the other hand, fiber, minerals, and vitamins are recognized as distinct classes of nutrients. Fiber, while technically a carbohydrate, is classified separately due to its unique physiological effects and roles in health, particularly regarding digestive health. Minerals and vitamins are crucial for numerous bodily functions, including metabolic processes and maintaining overall health, thus constituting their own respective classes within the nutritional framework.

This systematic categorization helps inform dietary guidelines and nutritional recommendations, ensuring that individuals receive a balanced intake of all necessary nutrients.