Prune Juice? Sugars? Constipation

[ZoeCat]

I'm suffering sluggish digestion and am hydrating well and having fruit and fibre but ow constipated. I was suggested 8oz/400ml or more of Prune Juice but worried about sugars even though its mostly sorbitol. First off, does prune juice really work for constipation? Have drunk a large glass and feel another glass may be needed.