Good short piece on natural vs medical therapies, focusing on the main difference being the rigorous research and clinical testing to substantiate effectiveness. Quote:
So natural does not necessarily equate to harmless. Nor does conventional necessarily equate to unnatural. Plenty of natural products are used in chemotherapy. These include extracts from the yew tree (docetaxel, paclitaxel), the opium and mandrake plants (epipodophyllotoxins) and from natural moulds that produce doxorubicin and related drugs, used effectively to treat breast cancer and lymphoma.
Some natural products used in conventional cancer medicine had for centuries been part of traditional folk remedies and have been adapted for modern use after being rigorously tested.
So the difference between alternative and conventional is not that one is natural and the other is not. It’s that conventional cancer treatments must be subjected to rigorous research before they can be recommended for use and prescribed by professional oncologists.