color parameters and overall color of intermittent heat pump-dried Ganoderma tsugae for different intermittency strategies. Their experimental results showed that, intermittent heat pump drying of Ganoderma tsugae at 28.4 C reduces the overall color change up to 40% for a = 0.67 when compared to continuous heat pump dried products. The reduction of total color change is more prominent for intermittent heat pump–dried product at a drying temperature of 40.6 C, which is up to 54.17% at a = 0.8.