I am sorry, I forgot to answer that part of your question. There is no harm adding Guarana to the cleanse, but it would still be better if you didn't. Guarana has a different purpose than the cleansing herbs.

Someone asked the question of a good source for the kidneys herbs. I usually recommend a herb/health shop in Minneapolis (see back of my liver cleanse book), called The Present Moment. They do mail order and mix the herbs for you if you ask them to. They receive many orders, since my books are their most bestselling books. The tel number is 612 824-3157.

Best wishes,
Andreas