Abstract
Many natural products of commercial importance, particularly in food and pharmaceutical industries, are complex mixtures of various substances. Examples herbal substances (phytochemicals) with claimed health benefits include the phenolic compounds (ex. curcumin, resveratrol, epigallocatechin gallate, and so on) and carotenoids (ex. lycopene, lutein, zeaxanthin, b-carotene, etc.). However,…