FIELD : medicine; pharmaceuticals.SUBSTANCE : group of inventions refers to pharmaceutical industry, namely to methods for increasing telomere lengths in individual cells (versions). A method of increasing telomere lengths in individual cells, involving measuring lengths of one or more telomeres in a cell sample taken from an individual' s body; administering to an individual an aqueous bark extract of a plant of the type Uncaria tomentosa in a pharmaceutically effective amount for a period of time sufficient to increase lengths of said telomeres in said cells of said individual; repeated measurement of lengths of one or more telomeres; if telomere elongation did not occur, introduction is continued; as a result, said method leads to elongation of said telomeres. A method for increasing length of telomeres in cells of an individual, involving : obtaining a nuclear cell sample from an individual' s body; measuring telomere lengths in said nuclear cell sample; orally administering to said individual an effective amount of an aqueous bark extract of a plant of type Uncaria tomentosa for a period of time sufficient to increase telomere lengths in the cells of said individual; obtaining a nuclear cell sample from the organism of said individual after said period of time; and measuring telomere lengths in said nuclear cell sample obtained from said individual body after said period of time; comparing said lengths of said telomeres obtained before the beginning of said period of time with said lengths of said telomeres obtained after said period of time; and continuation of administration if the telomeres are not elongated.EFFECT : methods described above are effective for increasing telomere lengths in an individual' s body.17 cl, 11 dwg, 1 tbl, 2 ex