Occasionally in this column, I’ll write about interesting books I have read. Sometimes the books are just for entertainment, and sometimes they provide useful information. A few months ago, I was intrigued by an article about a new book on healthy eating and exercise directed specifically to people over 50. Books on nutrition rarely have more than a few lines suggesting adaptations for people who have reached mid-life. This was an entire book on the subject.

The book had just been published, and I had to wait for a back-order to get it. The Whole Body Reset is written by Stephen Perrine with H...