Yes, with great success. Regular eating of raw sauerkraut, fermented radishes, beetroot and kombucha helped greatly with some digestive issues I was having a few years back.
Yes, it worked well for me. Good quality diary helped me as well. Also, cutting out processed food helps in that the less sugar you have, the less there is for the bad bacteria to feed on.
Anyone trying to increase eating fermented food to improve your gut biome?