I don't believe AT ALL in UT. I tried it when I was desperate for a cure, took it orally and as enemas, and it did nothing. Juice fast is in my opinion all you need.
edit: colitis and leaky gut are due to bad bacterias, fungus and parasites. I don't see how UT would touch those, as it did nothing for me. Properly thought juice-fasting, herbs, friendly bacterias and enemas is all you need.