uit is posionous
Disadvantages of canning include the time-consuming process, the need for specialized equipment such as a pressure canner, the risk of improper processing leading to food spoilage or illness, and the potential for changes in the texture or flavor of some foods.
canning preserves food by sterilising the food then sealing the can so there are no bacteria to grow
The sous vide method is not recommended for canning food at home as it may not reach the high temperatures needed to safely preserve food. It is best to use traditional canning methods, such as water bath or pressure canning, to ensure food safety.
preservatives
Canning is the process of applying heat to food that's sealed in a jar in order to destroy any microorganisms that can cause food spoilage.
steps for food canning and bottling
It kills and prevents the recontamination of harmful pathogens.
The method you are referring to is known as raw pack canning. In raw pack canning, raw food is placed directly into the canning jars and then covered with boiling liquid (such as syrup, water, or juice) before processing to preserve the food.
"Canning" food was originally done in 1809 by Nicolas Appert by sealing then cooking food in bottles. This was used by Napoleon's armies.
The canning of food products is equivalent to the preservation of food stuffs which could be used by both the military and civilian personnel .
Canning jars should be boiled for 10 minutes before using them for preserving food.
Home canning requires educating yourself on the science behind food preservation. This requires effort and diligence. The process of canning is time consuming and can be very tiring. I suppose these could be considered as disadvantages unless you do not mind working hard to provide delicious foods for you and your family and friends. The end result is worth the work.