For a more comprehensive treatment on the health and ecological consequences I'd recommend The Invisible Rainbow by Arthur Firstenberg. It discusses the topic in depth with respect to humans, insects, birds, trees, and more, across hundreds of years of history. It's very well researched; its references are 2/3 as long as the entire book.
The Body Electric by Dr. Robert Becker is another book to possibly look into. It talks about electricity from a medical perspective and talks a bit about the mechanisms by which electricity influence the body and what it can do. If nothing else, the interesting takeaway for me from this book was that he was able to induce limb regrowth in tissue using currents on the order of picoamperes (this is an unfathomably small current compared to what we interface with daily). He also notes that more or less is not necessarily worse in terms of electricity's impacts on the body, just different.
Here are some interesting highlights I've chosen from The Invisible Rainbow to give a broad sample.
