The title of this one is "The Royal Road to Health" by Charles A. Tyrell, MD, Copyright 1907. The subtitle is: Or the Secret of Health Without Drugs" My book was printed in 1916. I haven't read this one either, but I suspect it would be fodder for the blog and humorous to boot.
This is an ad in the rear of the book; one of several. Of course, the products being sold are prepared by Dr. Tyrell himself. Note that he says: "Delays are dangerous" I wonder how many sales he had in response to ads like this? Not many, or we might still have them on the market.