Disclosed is a potentiated T-cell modulator (TCM) designed for treating the symptomology of the disease known as vitiligo. The TCM is obtained by means of a dialysable leucocyte extract from leucocyte cells that contain polypeptides equal to or less than 10,000 daltons, which extract comes specifically from Selachimorpha or shark spleen. The TCM can also reactivate the cells of an individual's immune system, enabling the organism to reactivate the cells responsible for skin pigmentation, i.e. melanocytes, and balance the production of melanin in the skin by means of this cell activation. The TCM has a potency of 1012 leucocytes×mm3 (potency being understood as the quantity of leucocytes and quality of the flat, round and innocuous cells), which potency is the quantity necessary to excite the leucocytes and optimise the chemical signals for producing white blood cells, which in turn produce melanocytes, which produce melanin. When coupled to the chemical signals of neurotransmitters to potentiate the signal, the TCM helps the neurotransmitters to re-establish the chemical signals that travel from the brain to the bone marrow, establishing the correct chemical signals to the melanocytes and thereby “ordering” them to begin producing melanin.
