Which mineral(s) is/are needed by the body in small amounts?

The body needs several minerals in small amounts, also known as trace minerals. These include:

1. Iron: Iron is essential for the production of red blood cells.

2. Zinc: Zinc is necessary for the immune system to work properly and plays a role in cell division, cell growth, wound healing, and the breakdown of carbohydrates.

3. Copper: Copper helps with the formation of red blood cells, and it keeps the nerve cells and the immune system healthy.

4. Selenium: Selenium protects the body from damage caused by free radicals, and from infection.

5. Manganese: Manganese is necessary for the processing of cholesterol, carbohydrates, and protein.

6. Fluoride: Fluoride is necessary for the development of bones and teeth, and it helps to prevent tooth decay.

7. Iodine: Iodine is essential for the production of thyroid hormones, which control the body's metabolism and many other important functions.

8. Chromium: Chromium enhances the action of insulin, a hormone critical to the metabolism and storage of carbohydrate, fat, and protein in the body.

9. Molybdenum: Molybdenum plays a role in a number of important bio-chemical processes, like waste processing in the kidneys, development of the nervous system, and the activation of enzymes that are involved in breaking down food to produce energy.

These minerals are needed in trace amounts, but they are still crucial for maintaining good health.