I don't juice but I buy Carrot Juice. It's always about 5 bucks at the store and lasts me about 2 weeks.
I'm cautious though. I was on accutane as a kid which is like nuclear levels of vitamin A and I always wonder if that might have been a precursor to my UC issues now.
I only drink about 1/3- 1/2 a cup. I read somewhere a guideline recommended daily dose as 1/3 cup for the average woman, 1/2 cup for the average men, and 1/4 cup for children. Although I think with our condition, double that might not hurt? Just always a good idea to start slow.
I can't tell if it's helping for the UC, but I'm not too consistent with it. My skin seems better, maybe a bit more toned?