Freeze-Drying, The Best Way to Preserved Food?

Food preservation involves preventing the growth of bacteria, fungi (such as yeasts), or other micro-organisms (although some methods work by introducing benign bacteria or fungi to the food), as well as slowing the oxidation of fats that cause rancidity. Food preservation may also include processes that inhibit visual deterioration, such as the enzymatic browning reaction in apples after they are cut during food preparation. (Source: https://en.wikipedia.org/wiki/Food_preservation)

Based on The Home Preserving Bible (Source: http://astore.amazon.com/homepreservin-20/detail/1615641920), Canning, freezing, and drying food are the most common methods for preserving foods at home today. (Source: http://www.homepreservingbible.com/630-an-overview-of-10-home-food-preservation-methods-from-ancient-to-modern/)

There are other methods for preserving foods other than the above mentioned common steps, such as boiling, heating, salting, sugaring, smoking, pickling, jellying, curing (fermentation), pasteurization, vacuum packing, artificial food additives, etc.
(Source: https://en.wikipedia.org/wiki/Food_preservation)

Take a look at the short video about Preservatives:

However, there is one such method, so special and unique in the processing, with this method, the nutrients, the smells, and the flavours, are possible to preserved, upto 90-95% and with this technique, no prevervatives are needed to keep the sheft life longer! This method is call freeze-drying (Source: https://en.wikipedia.org/wiki/Freeze-drying) And this method are currently using by NASA too. (Source: https://en.wikipedia.org/wiki/Space_food#Processing)

All of the Nutritional Immunololgy Super Foods are being processed with two advanced technologies, which are freeze-drying and spray-drying. 

Cheers,
Casper Teo
82183033
casperteo.ct@gmail.com