Bayberry juice was spray dried with maltodextrin (DE 10) as a carrier and then stored under different
temperature and water activities (aw). The retention of the total phenolic content (TPC) and total anthocaynins
(ACN) during the drying process were about 96% and 94%, respectively, suggesting spray drying
was a satisfactory technique for drying heat sensitive polyphenols. Under an aw of 0.11–0.44, the TPC and
ACN in bayberry powders decreased by about 6–8% and 7–27%, respectively, after 6 months storage at
4 C; at 25 C for the same storage period the decreases were between 6–9% and 9–37%, respectively,
while at 40 C the decreases were in the range 7–37% and 9–94%. The anthocyanin component was more
readily degraded relative to other phenolic compounds. The results suggest that bayberry powder should
be stored at less than 25 C and aw of 0.33, on account of greater polyphenol stability under such
conditions