Which of the following is NOT one of the six major nutrients?

The six major nutrients essential for human health include proteins, carbohydrates, fats, vitamins, minerals, and water. Fiber is often associated with carbohydrates and is an important component of a healthy diet, but it is not classified as one of the six primary nutrients. Instead, fiber is considered a type of carbohydrate that the body cannot digest, which aids in digestion and helps to maintain gut health. The other options—proteins, carbohydrates, and fats—are all among the six major nutrients necessary for energy and overall bodily functions. Thus, identifying fiber as not one of the six major nutrients correctly reflects its role in nutrition.