Yes, it the mixture is disgusting. You need to eat something sweet right after such as a few pieces of orange, a table spoon of honey.
I don't remember the brand. Every health store around would have a fridge with stuff in it: organic yogurt,kefir, and pro-biotics. I just picked up one. Later i used pro-biotics that has multiple culture in it.
Do the castor cleansing before the Wilson protocol.
You may use cranberry juice for lemon. I did not try it though.