"Meat" is mainly the muscle tissue of an animal. Most animal muscles are composed of approximately 75% water, 20% protein, 5% fat, carbohydrates, and proteins. This food provides a wide range of essential nutrients and is a rich source of B vitamins compared to other types of food. Also, muscles are made of cell bundles called "fibers".

Each meat cell is filled with filaments with two proteins called "actin and myosin". In general, meats are a good source of animal protein and it is recommended to use them in the diet.