A Bright Life Inspired by Dr. Raymond Peat
Have you tried putting soil in capsules? I have had good results taking soil capsules from the garden.
Obviously not without risks but when I did it the die off was so intense I literally felt a burning sensation in my nostrils when I exhaled. Insane stuff. My gut is really a lot better now.
Thats just my crazy suggestion but scientists have been finding soil and gut bacteria ecosystems are VERY similar.