Lacto-fermentation is an ancient method of food preservation. Humans have been doing it for thousands of years. Before we had technologies like refrigeration and canning, lacto-fermentation was how we would extend the life of produce beyond the growing season.
Unlike pickling, where vinegar, salt and sometimes sugar are added to reduce the pH of the vegetables, lacto fermentation only requires the addition of salt. The lactic acid bacteria present on the vegetables do the hard work, lowering the pH of the brine to safe levels so no harmful bacteria can survive.
A lot of research is being conducted on the benefits of naturally fermented vegetables and probiotic rich foods. Studies are showing that probiotic foods support the following;
​
-healthy immune system
-weight management
-digesting and absorbing vitamins and minerals as well as elimination
-mental health
-healthy beautiful skin
Your gut is full of billions of bacteria so you would have to be eating a LOT of sauerkraut to have too much. Everything in moderation.
That said, it's not uncommon for people to experience a little gas and bloating during the first few days of eating fermented foods. As your gut adapts and balances itself, these symptoms will subside. Always start small and increase the amount you are eating over a few days. Start with one or two servings a day and listen to your body, it knows best.
Inside your jar is a living colony of bacteria. If left at room temperature, these bacteria start to wake up, get excited and sometimes they talk to you. The hissing sound is actually just the pressure building up from the ferment becoming more active, but its fun to imagine otherwise. So remember to keep your jar in the fridge to avoid this!
There is a best before date on the jar. As long as you don't introduce any new bacteria to the jar (ie. eating it straight out of the container) they should last a very long time. Fermentation produces an acidic environment that preserves the vegetables for many months. Fermentation never really stops, even in the fridge. It just slows significantly. The texture becomes softer, more sour, and complex with time.
It is always wise to check with your doctor, and do your own research before adding new foods to your child's diet, but all the research that we have done suggests that YES it is safe, and beneficial for children to eat fermented vegetables.
Foods containing live cultures will provide your little one with healthy, easily digestible nutrients, and probiotics.
Allowing, and encouraging children to explore different flavours and textures at a young age is a great way to prevent picky eaters (ahem...and picky adults too!).