The ancient Europeans used spices to preserve food and add flavor to the bland foods.
you can preserve foods by putting them in the refrigerator to slow down the bacteria process.
For the most part foods were stored by cooking and salting them, like making beef jerky for example. This allowed the foods to last through the winter.
To preserve foods one must get 5 gallons of ocean water in a sanitary bucket. put the bucket of ocean water in the sun until all of the water has evaporated. Remove the salt from the bottom of the bucket and put in a airtight container. Keep repeating this until one has enough salt to pack around the food one wishes to preserve.
Many of the foods that were eaten in the middle ages are the same as those we eat today. Modern farming methods and technological advances have improved the quality and quantity of many of the foods we now eat. also the variety of foods and the fact that you can have fresh foods that are not grown locally are out of season. The production of prepared and processed foods from that are delivered from all over the world. The choice of foods as well as the ability to preserve foods today is far far greater then Ever. the risks that exist in many foods are naturally also there. but all in all people with access to the modern diet live far longer and healthier lives.
On meat, salt can preserve food.
Mostly fruits.
By using a fridge
to preserve foods, dye fabric, and de-ice roads
Foods that are frozen to preserve freshness.
Fridges and banks.
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Sodium chloride the taste of foods; also preserve foods.
To preserve food and for flavoring. They use salt for their diets to survive also to preserve foods, and make bland foods tasty
Salts and sugars work to preserve foods by creating bonds. These bonds prevent bacteria from entering the food cells and breaking them down.
Salt
reduce water activity.