A combined fermented cactus fruits and pitahayas (dragon fruits) juice is produced by extracting the juice from the cactus fruits and pitahayas including peel thereof, adding a suitable amount of water, placing probiotics in the juice, and leaving the juice to ferment at a controlled temperature. The anti-free-radical DPPH activity of the combined fermented cactus fruits and pitahayas juice increases significantly compared to that thereof prior to the fermentation.一種將仙人掌果與紅龍果帶皮榨汁後,加入適量的水,再植入益生菌,並於控制的溫度下使其發酵,經發酵後的仙人掌果與紅龍果混合汁液內所含有的抗自由基DPPH活性與發酵前相比,發酵後的仙人掌果與紅龍果混合汁液內所含有的抗自由基DPPH活性有明顯的增加。1‧‧‧榨汁步驟2‧‧‧植菌步驟3‧‧‧發酵步驟
