A lot of research work has been done and is still on concerning phytochemicals . Why are they not yet utilized in place of synthetic drugs to cure or prevent diseases being natural, cheap and with less side effects ?
Their are several natural products accepted as a drug and replacement of chemical drugs but due to lack of full investigation in natural product pharmacological and biomedical , low numbers of natural drugs. Also. Phytochemical diversity detected in natural products due to environment diversity limited it's use as a drug.
Single phytochemical isolated from natural sources may produced as very low quantity and not reach economics of production so requride medical chemistry to improve quantity or it is bioavailability some times anlogs from medicinal chemistry application more potant than parent phyto chemicals
Why not. Our Institute produces the substance of more than 30 substances of medicinal products from plant materials. The most dominant are the substance of the drug Allapinin.