How much protein does a 75kg man need to build muscle?

As mentioned above, the ideal amount of protein to build muscles is between 1.2 grams to 2grams per kilogram of body weight. So, between 90 grams to 150 grams of protein are needed by a 75kg man to build muscle.

Will muscles grow without protein?

An inadequate protein intake can lead to loss of muscle mass. Consuming enough protein for your individual requirements is essential to maintain muscle mass. Essential amino acids are also a vital component that support maximal muscle growth. Protein is essentially required to rebuild and repair muscles; without protein, growth is impossible.

Do carbs or protein build muscle?

Proteins are needed to build and repair muscles, but carbohydrates also play a necessary role in maintaining muscle mass, as well as recovery. Carbohydrates provide the energy needed to sustain physical efforts and help prevent muscular fatigue. So, a combination of proteins, carbohydrates, and healthy fats is required to support optimal muscle growth and repair. Protein lays the foundation or building blocks of muscle mass, but carbs sustain and prevent muscle damage while working out. Therefore, both are needed to build muscles.