Amino acids are elementary structural units for the formation of proteins and some of them cannot be synthesized within the human body but should enter from outside. When the indispensable amino acids are lacking or some of them are completely absent in food the synthesis of full-blooded proteins becomes impossible with the following disturbances in the work of a number of systems and the appearance of various diseases. We have studied the amino acid composition of the aboveground and underground organs of two species of Verbascum widely growing on the territory of the Republic of Kazakhstan. 16 amino acids have been identified in the studied objects, 8 of which being indispensable, their quantitative composition has been established.