Well, Heraclitus was the one who said basically everything flows/changes and change is probably the single fundamental property of reality. Bohmian quantum mechanics is heavily influenced by it. David Bohm talks about Heraclitus in a few of his books like "Wholeness and the Implicate Order".
Peat's work on metabolism and health are simply a corollary of this philosophy - change is fundamental and the way energy (electrons) flow through the body determines health. If electron flow is fast and unimpeded (from food to oxygen), proper structure is built and health is optimal. If electron flow is interfered with, bizarre distortions in structure occur and eventually serious pathology and even death follow.
Heraclitus said things are always becoming, realizing their potential. Human beings are the same, and how we realize our potential depends on this electron flow.