Ever wonder why a person can run like the wind, pole vault to incredible heights, and cartwheel for all his worth? Well, apart from the strength of his muscles, it’s also because of the wonders that macronutrients can do for his body, says AHEAD Tutorial & Review Center Biochemistry Lecturer, Julius Nuñez.

Teacher Julius shares with us the many wonders of macronutrients.

Macronutrients are substances essential for growth and metabolism. There are three macronutrients that serve as body energizers: carbohydrates, proteins, and fats.

Let’s take a look at each one.


Carbohydrates are like powerhouses from which energy for all cellular functions, especially for the brain, muscles, kidneys, and central nervous system, come from, says Teacher Julius. It is the macronutrient that we need in the biggest amounts. About 45 to 60 percent of calories must come from carbohydrates.

Apart from being the body’s main source of fuel, carbohydrates are also important for the health of the intestines.

According to AHEAD Tutorial & Review Center Biochemistry Lecturer, Julius Nuñez, the main sources of carbohydrates are starchy foods like grain and potatoes, fruits, and milk. Carbohydrates may also be found in vegetables, beans, and nuts but in smaller amounts.


Proteins are the building blocks of every organ system, including muscles, bones, hair, skin, cartilages, and the circulatory system. About 10 to 35 percent of calories must come from protein.

Proteins provide structures for enzymes, which are organic compounds that process many chemical reactions in the body like converting food into energy. Some proteins, like antibodies and insulin, make it possible for cells in different parts of your body to send signals to one another. In this way, the body releases hormones and fights infections.

According to AHEAD Teacher Julius, proteins may be found in meat, fish, poultry, milk, cheese, legumes, and nuts.


Fats are part of our daily diet. Fats are the organs’ natural shock absorbers. They blunt trauma and store energy for future use. About 20 to 35 percent of calories must come from fat.

Fats contribute to the body’s normal growth and development. They are also the most concentrated source of energy.

According to Teacher Julius, fats may be found in meat, poultry, fish, nuts, butter, margarine, milk products, oils, and lard.

Knowing these macronutrients will not only help you get ahead in your science and nutrition classes says AHEAD Tutorial & Review Center Biochemistry Lecturer, Julius Nuñez, it will also help you understand how the body works. By being conscious of what nutrients your body needs, you’re on your way to better health, and with it, better grades!

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