Buzz killers and no-it-alls

Just spoke about the cleanse with a holistic-minded friend of the family who i thought was going to say hurray 4 u...
Just the opposite happened.
He ranted about putting good things into the body and not depriving it (which is good advise, but after the cleanse and for regular eating life).
He was very against me doing this 9siting alot of Gary Null Negativity) and saying that i am taking good bacteria out of my body when doing this and i need to be taking supliments while cleansing, for no more than 3 days etc...
I told him of the Master-Cleanse book and the forum and he continued to tell me that i can't always believe whay i hear/read...
I told him that i've read testimonials and "speak" real-time with you folks and others who have actually CURED diseases and feel 100% better after coming off an Master-Cleanse and changing eating habits etc..

I was soo happy to be on the cleanse this morning and i woke up energized, un hungry, looking forward to reading the Master-Cleanse forum , and then that... Totally bummed my flow.
I'm still doing it for the 10 days, but i just wanted to rant..

I believe i did read on the other forum (against fasting), that we do remove good bacteria from out colon/liver when cleansing... is that true and how do we return it?
Eat yogurt after the cleanse??

JG