Beans contain anti-nutrients that your gut doesn't like. They also may contain toxins from moulds and pesticides. Pre-fermenting them with Shiokoji or Kombucha helps to break down the anti-nutrients and break down the toxins.

In Phase II D2D remember to add foods gradually. Adding lots of fermented foods all at once can be lead to a Herxheimer ('die-off') reaction. This is where the microbes in the ferment compete with the microbes in the gut (usually the upper intestine) and cause the microbes in the gut to die, leaving inflammation, bloating and pain. By adding one new food per week, this is less likely to happen.