Responding to some of the anti fat freeze drying comments. Some of the things said over and over are simply NOT true! Freeze dried food with fat in it (a lot of fat), can last for more than 30 YEARS!!! Start reading the labels on freeze dried food bags.
(Stop washing your ground beef!)
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Scrambled Eggs with Bacon
https://mountainhouse.com/collections/breakfasts/products/scrambled-eggs-with-bacon-pouch
Ground Beef
https://mountainhouse.com/collections/freeze-dried-meats/products/ground-beef-10-can
Creamy Macaroni & Cheese
https://mountainhouse.com/collections/vegetarian-meals/products/creamy-macaroni-cheese-pouch
Veggie Chorizo Breakfast Scramble
https://mountainhouse.com/collections/vegetarian-meals/products/veggie-chorizo-breakfast-scramble-pouch
Dried Whole Egg Powder
https://augasonfarms.com/collections/eggs-dairy/products/dried-whole-egg-powder
Freeze-Dried Beef (100% Real Meat)
https://augasonfarms.com/collections/meats-proteins/products/freeze-dried-beef-100-real-meat
Freeze Dried 1/3-lb Uncooked Hamburger Patties
https://freezedrywholesalers.com/collections/raw-foods/products/freeze-dried-hamburger-patties
There are plenty of scientific and industry papers out there about food rancidity, and I've found them to be very interesting and informative;
Chemists define roughly two ways a product can turn rancid: (Super simplified)
1. Oxidative rancidity: Reaction involves oxygen
2. Hydrolytic rancidity: Reaction involves water
(The main mechanisms for it to go rancid involve water and/or oxygen, (and light) and we remove them all)
Rancidity of Food: Introduction, Types, Factors and Prevention of Rancidity | Food Chemistry | Biotechnology https://www.biotechnologynotes.com/food-biotechnology/food-chemistry/rancidity-of-food-introduction-types-factors-and-prevention-of-rancidity-food-chemistry-biotechnology/14100
Food spoilage – Rancidity and food chemistry. September 14, 2017 Storing Food - chemical reactions, fats, food enzymes, preservation https://foodcrumbles.com/food-spoilage-rancidity-and-food-chemistry/
Prevention of Hydrolytic and Oxidative Rancidity and Nutrient Losses in Rice Bran During Storage https://digitalcommons.lsu.edu/cgi/viewcontent.cgi?article=7859&context=gradschool_disstheses
Rancidity https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/rancidity
Functions of Rosemary Extract in food and its labeling. https://www.nutexa.com/en/2017/11/16/functions-rosemary-extract-food-labeling/
Use of rosemary extracts as a food additive https://efsa.onlinelibrary.wiley.com/doi/epdf/10.2903/j.efsa.2008.721
Water Activity (aw) in Foods https://safefood360.com/wp-content/uploads/Water_Activity_In_Foods.pdf
Books:
Freeze-Drying of Pharmaceutical and Food Products ISBN-13 : 978-0081014646 (I don't have this one yet - haven't seen a good price yet)
Foods and Food Production Encyclopedia ISBN-13 : 978-1468485134 (got the paperback set for a great price)
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Before buying a freeze dryer, perhaps research to find out more about the downside of the machine; some people have problems with their machine and it's big and heavy and hard to return!
I'd check Costco first to see if you can get one there. - Best return policy:)