Which nutrients your body will get and how much depends on your diet. Nutrients are chemical substances that help your body maintain tissues, make energy, regulate different processes, etc. Nutrition is the process of taking nutrients from various foods. There are six classes of nutrients: lipids, carbohydrates, proteins, water, minerals, and vitamins.
The third three classes are known as macronutrients because our bodies need them in large quantities. Lipids, carbohydrates, and proteins are unique because they are the only elements that provide the body with energy. Energy is measured in calories.
Water is also a nutrient that some scientists categorize as a macronutrient because our bodies need it in large quantities. Water is quickly lost through sweat and evaporation, so you need to fill up by drinking liquids and eating fruits, vegetables and other foods that contain water.
Consuming a healthy diet with vegetables, fruits, protein, and dairy ensures the body has enough nutrients to use.