shows that the content of b-carotene depends a lot on the frequency changes in air temperature. Namely, for the lower frequency changes the temperature of carrot remained below 50 C for a long time in each drying test. The drying time also affects the loss of b-carotene. Comparing the retention values with the drying times, it can be stated that for the regular changes of the air temperature, where the drying time was the shortest, the dye in the dried material retained to a high degree