Have you read any articles in the past six months that talk about how western medicine is beginning to fail? There are shows and discussions about this on the radio and on television or the internet. The big issue seems to be that the artificial medicines are no longer beating back diseases caused by viruses, bacteria, and infection.
Lone Pine Publishing has several books on herbs and plants, and healing. I am reading "Medicinal Garden Plants for Canada". It is filled with information about the plant and the ailment in humans that the plant can heal. White clover tea, for example, is used by First Nations people to revive the exhausted or to fight fevers.
The best thing is that many of these plants can be grown in balcony pots. Perhaps it is time to try growing some plants to experiment with.