Medicinal plants are widely used in many parts of the world; due to traditional knowledge and popular use of certain plants specially by the rural community.
Your question is of wide background. Standardized Plant extracts have been used traditionally in the management of a wide range of disorders. In Ayurveda, Kwath (decoction), Swaras (Juice), Asav and Arishta (medicated alcohol) uses extracts from plant sources. In Homeopathy the tinctures have similar background. Now ad days also there are reports published on pharmacological aspect of medicinal plants.
Thank you for your response. I want to know how researchers like you define what standardization of plant products is all about. That is what is the principle behind standardizing and how does one use such products for medicinal purposes? That is my original idea. But we can further discuss on it.