Vitamins and Minerals Why They Matter for Your Health

Vitamins and minerals are essential micronutrients that the body needs to perform a wide range of normal functions, from supporting immunity and bone health to helping convert food into energy. Unlike carbohydrates, proteins, and fats, these nutrients are required in small amounts—but their impact on health is significant. Because the human body cannot produce most vitamins and minerals on its own, they must be obtained from the foods we eat.

What Are Vitamins?

Vitamins are organic compounds that help regulate metabolism, support growth and development, and maintain overall health. They are classified into two main groups:

• Fat-soluble vitamins:
  These include vitamin A, vitamin D, vitamin E, and vitamin K. They dissolve in fat and are stored in the body’s fatty tissues and liver. Because they can accumulate over time, excessive intake—especially through supplements—may increase the risk of toxicity.
• Water-soluble vitamins:
  This group includes vitamin C and the B-complex vitamins, such as vitamin B6, vitamin B12, and folate. These vitamins dissolve in water and are not stored in large amounts in the body. Any excess is usually excreted through urine, which means they need to be consumed regularly through food.

What Are Minerals?

Minerals are inorganic elements that originate in soil and water. Plants absorb these minerals, and humans obtain them by eating plant foods or consuming animal products. While many people are familiar with major minerals like calcium, sodium, and potassium, the body also relies on trace minerals—such as iron, zinc, iodine, copper, and selenium—which are needed in very small quantities but are vital for processes like hormone production, immune defense, and enzyme activity.

Recommended Intakes and Dietary Guidelines

In the United States, the National Academy of Medicine (formerly the Institute of Medicine) establishes nutrient reference standards known as Dietary Reference Intakes (DRIs) for vitamins and minerals. These guidelines are designed to support good nutrition and provide a scientific foundation for dietary recommendations in both the U.S. and Canada.

The DRIs:

• Are specific to age, sex, and life stage (such as pregnancy or older adulthood)
• Cover more than 40 essential nutrients
• They are based on scientific evidence related to nutrient deficiencies and potential toxicity

Do You Need Multivitamins?

A balanced diet rich in fruits, vegetables, whole grains, high-quality protein sources, and healthy fats can usually supply most of the vitamins and minerals needed for good health. However, not everyone consistently meets these nutritional needs due to dietary restrictions, health conditions, or lifestyle factors.

In such cases, multivitamin supplements may help fill nutritional gaps when diet alone is insufficient. Supplements can be particularly useful for certain populations, such as older adults, pregnant individuals, or people with limited food variety. Still, they should complement—not replace—a healthy diet.

Below is a table outlining common vitamins and minerals along with their recommended daily intakes to help guide informed nutritional choices.