Nutritional Pharmacology is the application of known bio active components of food that when administered has a health effect.
Given that bio active substances are not created and isolated in labs, but instead grown. They have an intrinsic coherence with other molecules associated with them that cannot be duplicated by man.
Vitamin C for example will halt the progression of Scurvy, but will not cure it on its own. To cure Scurvy, a natural form of Vitamin C is required with the regime of associated flavonoids.
The fundamental coherence of the human body can often only be supported by the natural, nutritional coherence of your food/medicine.