What is the term for vitamins that the body requires in very small amounts?

The term for vitamins that the body requires in very small amounts is "micronutrients." These are essential nutrients that play critical roles in various bodily functions, including metabolism, immune function, and overall health. Micronutrients include vitamins and minerals, which are needed in minute quantities compared to macronutrients (carbohydrates, proteins, and fats) that the body requires in larger amounts for energy and growth.

Micronutrients are vital to the proper functioning of the body, although the quantities needed are significantly smaller. For instance, vitamins such as vitamin C and several B vitamins fall into this category, contributing to processes like energy production, brain health, and skin health.

In contrast, macronutrients (the first option) are nutrients required in larger amounts to provide energy and support physiological functions. Phytochemicals (the third option) are naturally occurring compounds found in plants that can have health benefits but are not classified as essential nutrients. Antioxidants (the fourth option) are substances that help prevent damage to cells caused by free radicals but can be both macro and micronutrients, encompassing a wider range of compounds beyond just vitamins.