now finally been told after 2 years under gastro this is my problem.....5% normal range I think 18% average.....on the loo 24/7, tummy cramps and omg the bloody itching where the bile salts don't work as normal and deposit under the skin aaarrrr!!! Tried x2 meds not worked dr crap living off piriton for itching waiting to go to a new hospital ......anyone :-(