3.1 Bioavailabilty
The medicinal potential of majority of the phytochemicals is limited by
their poor water solubility and absorption rate due to their lipophilic
nature. Some of phytochemicals have very short half-life so before going
to target tissue they are excreted out of body. The concern of
bioavailability hinders the progress of phytochemicals in clinical
progress. There is hope that some phytochemicals with their
carrier-mediated delivery and/or their analogs may finally give the
solution for eliminating this deadly HNC disease.