I found this book useful in the sense that it confirmed and expanded on the things i already knew about osteopenia. It's also great to have a book which focuses on osteopenia, rather than just full-blown osteoperosis. The case studies are interesting as they look at different ages, genders, and lifestyles and examine how the people came to have osteopenia and how they could work to reverse the effects. I liked this aspect as it didn't assume the reader to be over 50, as a lot of other osteopenia/osteoperosis books seem to do. It also contains useful information about foods and their calcium contents, different calcium and mineral supplements, t-scores, and bone strengthening exercises, amongst other things. A general, but useful and informative book.