What are unclassified essential nutrients?

Unclassified essential nutrients are those substances that are vital for human health but do not fit neatly into traditional categories like vitamins, minerals, proteins, fats, or carbohydrates. These nutrients include compounds such as phytochemicals and antioxidants that support various bodily functions and promote overall health. While they may not be classified as essential in the same way as vitamins and minerals, their intake can contribute significantly to preventing diseases and enhancing well-being. Examples include flavonoids, carotenoids, and other bioactive compounds found in fruits and vegetables.