Jumping on the juicing wagon

Hi everyone. I have decided it is time for me to do a juice fast. Today is day 1 for me. I'm not sure how much juice I should allow myself to have each day?
Just 3 and lots of water? Or can I have more? My breakfask juice was spinach, celery, carrot and tomato with a pinch of Celtic Sea Salt . It was yummy, but I feel like I could do another glass of it. I am fasting to cleanse and to spur some weight loss. Tweet