Look what I found at the very back of the SYL manual where Schulze was talking about juice fasting.
"Fresh citrus juices with their rind are great liver cleansers.
SCHULZE: The bitter oils in citrus are big time liver cleansers. They disinfect and create more bile flow. And you have to get in the rind, which contains pectin. Run that rind through your juicer or your Vita-Mix. I look at citrus more as kidney and liver cleaning. It's also very effective for cleaning the blood and joints, like with arthritis."