How many nutrients are required in lesser quantities and what are they commonly called?

Nutrients required in lesser quantities are commonly known as micronutrients. These include vitamins and minerals such as iron, zinc, copper, manganese, selenium, and various B vitamins. While they are needed in smaller amounts compared to macronutrients, they play crucial roles in various physiological functions, including immune response and energy production. Deficiencies in micronutrients can lead to significant health issues.