Crude protein is the amount of protein in animal feed or certain foods. Crude protein depends on the nitrogen content of food proteins. Crude protein measurements are widely performed in the fields of animal husbandry and food science, and these measurements have economic consequences. Crude protein as a measure can raise the amount of protein in a food. Food manufacturers use the crude protein content to calculate the amount of carbohydrates in foods.
The concept of crude protein is frequently used in nutritional formulation today. However, this concept is questioned as it is all about amino acids, not crude protein content.
The amount of crude protein is expressed as the amount of nitrogen analyzed multiplied by 6,25 times. Since the second half of the 1800s, feed composition for analytical purposes has been divided into various groups of substances. Crude protein was defined by the nitrogen-containing fraction. Here the average nitrogen content is assumed to be 16 percent and a factor of 6,25 is used.
The amount of crude protein an animal consumes is considered an indicator of its nutrient intake. Nutritionists have to deal with crude protein regularly.
According to the prevailing view today, crude protein is not any indication of the nutritional value of a protein, the nutritional value of a protein depends on the composition of the amino acids it contains.
The analysis work carried out at our institution is based on state-of-the-art equipment, a trained and experienced staff, and modern methods. Among the numerous tests conducted within this scope are feed analysis – crude protein analysis services.
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