ANSWER
Freeze-dried could retain the majority of vitamins and minerals. The process is so fast that it removes the moisture from the food without destroying the food structure (Sarangam & Chakraborty, 2015).
References
Sarangam, S. & Chakraborty, P. (2015). Comparative Studies on Quality Analysis of Freeze Dried and Cross Flow Dried Amla Powder. International Journal of Research in Engineering and Technology, 4(4), 620-624.