don't you suppose that if you you are doing this for weight loss, that it wouldn't matter if you are drinking coffee?

i'm doing The Master Cleanse tomorrow and a friend wants to do it with me for weight loss; i'm a firm believer in nothing but the lemonade, but she says she can't do without black coffee and breath mints.

i suppose if she has a different agenda, she can do whatever she likes, but i was wondering if coffee makes you retain fats, etc. anyways because it dehydrates you.