Why does juice, especially apple constipate me?!

Why does juice, especially apple constipate me?

When I was a kid I couldnt drink apple juice because it would go right through me, Now I'm a huge Juice drinker, probly about 6 cupd a day diluted with some water, especially apple juice. I've had constipation problems for years, and I have figured out that when i stay away from juice and just drink milk and water I'm not constipated.... Apple juice is supposed to help you go, whats up with that? I hate not drinking juice and I'm not drinking half as much as I used to, though I'm happy I have no more problems.

3 weeks ago
It took me about 3 years to figure out it was the juice, I'm a healthy eater, I dont eat to much fruit, but always alot of veggies,,, always100 percent wheat bread too, never white.

I'd guess based on the insufficient information I've got that you could have an iron sensitivity. Check how much is in the juice you're drinking. Iron can cause constipation. While juice tends not to have a lot of iron in it, it does have a decent amount. But so do a lot of other things you're probably eating. Maybe the juice is putting you over your limit. I'm assuming you've talked to a doctor... you probably need a specialist.