I was thinking to myself earlier that many people have dietary restrictions of SOME sort. Whether that be self-imposed or pre-determined. Plenty of people have allergies or take medications that don’t allow them to have certain foods, Grapefruit is (or was idk) not good for people on Blood Pressure medication I hear firsthand. Then there’s the religious exemptions, like avoiding Pork or alcohol or Beef. Then there’s also the ideological exemptions; Vegetarianism, Pescatarianism, Veganism, I could go on. TL;DR: Do you have a dietary restriction and if so, why?
You might be really deficient in fiber, which fruit have a lot of and fruit juice has none of. Getting a good fiber intake after a prolonged period of time of being deficient will be problematic and causes a lot of people to stop before they can overcome that.
I highly doubt that. I eat plenty of grains and vegetables which are higher in fiber than most fruit. My guesses are it's either to do with the fructose content or the high acidity. Cause concentrated fruit juices don't always sit that well with me either, i usually water them down by at least 50%.