Therefore, the thermal stress of spray drying on the polyphenols was expected to be rather minor, at least under the operating conditions applied. However when spray drying of black carrot anthocyanins, higher air inlet temperatures (>160–180 C) and outlet temperatures (107–131 C) caused greater anthocyanin losses. In the present study, the inlet temperature of 150 C and outlet temperature of 80 C were associated with high retention rates of TPC and ACN