Fermentation is another method used in preserving food. It is the process of breaking down sugar with bacteria and yeast without oxygen. Although you can buy some fermented foods at the store, you can make a lot of them at home. Fermented food has a lot of health benefits. It is mainly great because of the probiotics it contains that help with digestion, but it is also an antioxidant that helps fight cancer. The link below has a list of ten fermented foods and the recipes to make them.
10 Of The Best Fermented Food Recipes
It is recommended to get your carbs from fermented food if you are on a low-carb diet because the sugar is already broken down.