Anything with vitamin C does indeed help rolling, as well as any other drug that works on the serotonin receptors.
Vitamin C binds with Vitamin B6 in the body, making 5-HTP. 5-HTP "refuel's" your serotonin levels in the body, making for a stronger experience. Some people even report "Feeling your brain refuel"
nah i read up on this, i guess the juice just makes ur stomach more acidic, which in turn helps digest the mdma faster, which results in a stronger high.
I used to drink loads of OJ when rolling. But having gone without it numerous times, I really don't think it makes any difference. I just like the taste of it while rolling, and the vitamin C can't hurt to take anyway.
Fruit juices are a dangerous combination with many drugs including MDMA. Depending on various genetic factors it can result in a overdose causing death. Its really not a good idea, take the number of pills you feel safe with and leave the juice out of the picture. You have no idea how the juice will affect the metabolism of the drug in your body or even that day. When/If MDMA were a prescription medication i am very confident it would carry a don't take with juice warning.
Be safe, just because other people do it and talk about it doesn't make it smart or safe.