Protein: Distribution, Functions, Demands, Deficiency, and Excess
Wojciech Wiśniewski
2026-03-21
7 min. read
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1 zdjęcie
2050
Protein serves as one of the primary sources of energy and building materials for the human body. Proteins account for about 20 percent of the body's dry weight and are essential for maintaining muscle mass. This article describes what protein is, the functions it fulfills, where to obtain it, and the effects of consuming less or more of this macronutrient in the daily diet.
Significance and fundamental classifications of proteins
Proteins are intricate nitrogen compounds composed of amino acids that are bonded together by peptide bonds. Among the components of proteins, we can distinguish nitrogen, carbon, oxygen, sulfur, and hydrogen. Such proteins are referred to as simple proteins. However, there are also complex proteins that, in addition to the aforementioned components, also contain other substances, such as phosphoric acid, carbohydrate residues, or fats.
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