Food as a therapeutic agent? While giving us a tour of Kitchen By Mike's Physic Garden, Mike McEnearney imparts his wisdom on the therapeutic properties of various plants, herbs, fruits, and vegetables.2009 saw a shift in my perspective on food. It was on my mother-in-law's farm in Wales that I first learned about therapeutic herbs. She had planted them for their medicinal properties, even though I was aware that many of them were used in cooking.