However, not all studies have shown consistent and promising result of herbal therapy in IBD. The reasons for the discrepancies from studies could be related to the different study designs, small sample size, lack of adequate controls, overlapping treatment effects, variety of drug formulations and doses used and poor reporting of results, which have led to results that are, in some instances, difficult to interpret.[48, 49] The major problem in interpreting these results is the generally low quality of the randomised controlled trials. Publication bias is also likely to be a significant problem whereby positive results are being preferentially published.[50] Most herbal medicines should undergo a similar level of rigorous testing as pharmaceutical drugs. With the increasing demand from the public, the manufacture, marketing, and prescription of herbal medicines is expected to continue to grow.