CONCLUSION
The vitamin C content of both fresh and freeze-dried guava, mango, papaya and pineapple was determined. Although losses have occurred during the process, the ascorbic acid content retained in the freeze-dried guava, mango, papaya and pineapple characterizes these products as a valuable source of vitamin C. Concerning to papaya, the use of conventional freezing led to higher vitamin C loss when compared with the cryogenic freezing