Macronutrients are the big three types of nutrients that our bodies need to stay healthy and energized. They are carbohydrates, proteins, and fats. Each one plays a special role in how our body works and gives us energy.

1. Carbohydrates:

   • Carbohydrates are the main source of energy for our bodies. They give us about 4 calories for every gram we eat.
   • According to the Dietary Guidelines for Americans, carbohydrates should make up about 45-65% of what we eat each day.
   • Complex carbohydrates, like whole grains and beans, are great because they give us steady energy. They take longer for our bodies to digest.

2. Proteins:

   • Proteins are super important. They help repair our muscles, support our immune system, and make hormones. They also provide 4 calories per gram.
   • Proteins should account for about 10-35% of what we eat daily.
   • Even though proteins can be used for energy, their main job is to build and repair parts of our body.

3. Fats:

   • Fats are a source of energy too, giving us around 9 calories for each gram. This makes them the most calorie-rich macronutrient.
   • Fats are necessary for making hormones, absorbing nutrients, and helping our cells function. They should make up about 20-35% of our daily intake.
   • Healthy fats, like those found in avocados and nuts, offer lasting energy, which is helpful during exercise.

It's important to have a good balance of these macronutrients to keep our energy levels up throughout the day.