Why are amino acids essential

Essentials (vital) amino acidsare necessary building blocks of proteins and must be ingested with food, as the human body does not have sufficient self-synthesis.

The essential amino acids include [1, 2, 3]:

  • Histidine *
  • Isoleucine
  • Leucine
  • Lysine
  • Methionine
  • Phenylalanine
  • Threonine
  • Tryptophan
  • Valine

Amino acids are not only of great importance as building blocks of proteins, but also serve as starting products for a variety of compoundsthat take on important metabolic functions in the body. So, for example, becomes the vital L-carnitine, which, among other things, has an important role in lipid metabolism, from the two essential amino acids lysine and Methionineeducated.

If the body lacks an amino acid or if it becomes an endogenous oneActive ingredient, such as a hormone that is no longer sufficiently manufactured, important body functions are no longer optimally guaranteed.

*Histidine is certainly essential for the infant [2]. For adults, histidine may be classified as semi-essential (conditionally vital) [1].


  1. Rehner G, Daniel H: Biochemistry of Nutrition. 2nd revised and expanded edition. Spectrum Academic Publishing House, Heidelberg, Berlin 2002
  2. Hahn A, Ströhle A, Wolters M: Nutrition - Physiological Basics, Prevention, Therapy. Wissenschaftliche Verlagsgesellschaft mbH Stuttgart 2006
  3. Löffler G, Petrides P, Heinrich P: Biochemistry & Pathobiochemistry, 8th edition, Springer Medizin Verlag Heidelberg 2007
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