Here are the six macronutrients:

* Water: This is the most important nutrient and is needed in the largest quantities.

* Carbohydrates: These are the body's primary source of energy.

* Proteins: These are essential for building and repairing tissues.

* Fats: These provide energy, insulate organs, and help absorb vitamins.

* Calcium: This is essential for bone health, muscle function, and nerve transmission.

* Phosphorus: This is important for bone health, energy production, and cell function.

Let me know if you'd like more information about any of these macronutrients!