The heat decomposition of betacyanins takes place at pH 2.2–4.0 according to the first-order kinetics; at pH value 5.0 and above the complete decomposition of betacyanins can be better described using a rational exponent-order kinetics. The destruction rate of betacyanins strongly depends on the temperature. In the pH range 2.2 to 8.0 and at temperatures from 50 to 90 °C the Q10 value ranges from 2 to 3. The region of the maximum heat stability is from pH 4.0 to 6.0. Heat stability of the best concentrate does not differ significantly from that of the betacyanin isolated from the same concentrate.