Which of the following refers to substances that enhance body functioning but are not essential nutrients?

The correct answer is that active non-nutrients refer to substances that enhance body functioning but are not classified as essential nutrients. These compounds can provide health benefits, such as improving digestion or boosting the immune system, but they are not required for basic survival or physiological function in the way that essential nutrients like vitamins, minerals, proteins, fats, and carbohydrates are.

Active non-nutrients may include phytochemicals found in plants, which have various beneficial properties, such as antioxidant effects or anti-inflammatory properties. By enhancing overall body function and promoting health, these substances contribute to wellness but are not necessary for the body to perform fundamental biological processes.

In contrast, dietary supplements typically consist of vitamins, minerals, and other nutrients that can help fill gaps in a person’s diet but do not fall under the category of non-nutrients. Fiber-rich foods are important for digestive health and provide essential nutrients, while probiotics are beneficial microorganisms that support gut health but are also not classified under the category of active non-nutrients.