Fermented foods are full of good bacteria (lactic acid - producing bacteria) that improve the gut's health, removing toxins from the body, helps to loose weight, boost your immune system, beneficial to people with diabetes, has anti - cancer properties, plus they fight harmful bacteria and is budget friendly as it easy to make at home.
Almost all cultures in the world had a varieties of fermented food in their traditional cousins (kumiss, kombucha, kwass, miso, etc.), these with the time, unfortunately, are getting lost, as we now having fridges, tins, take away food and very often we are just to busy to make it.
Here is my fermented food: sauerkraut, kimchi and kwass. I enjoy fermented food every day. Here is my favourite recipe with sauerkraut: https://youtu.be/tXWPI9C0taU