If you want the real story on the market forces behind osteoporosis then I highly recommend you read this book. Gill Sanson's book is both easy to read and well referenced.
At the age of 41(pre-menopausal, non-smoker, healthy diet and exercise, small boned, never fractured) I was diagnosed with osteoporosis in the spine with risk to fracture and osteopenia in the hip. I was petrified I would break at any moment and confused by conflicting medical opinions. I was lucky enough to come across Sanson's book which included a list of diagnostic tests one should do to rule out any medical conditions which could cause accelerated bone loss. My test results were normal, indicating my problem was mainly herditary - I did not attain peak bone mass. As it turns out, my older sister decided to have her bone density checked also and hers was similar to mine. She has been lactose intolerant all her life while I always took lots of dairy products. She rarely exercised; I exercised regularly. She is also pre-menopausal and small boned and has never fractured.
Sanson goes into some detail regarding the myth of the importance of dairy products in the diet and notes cultures with little or no calcium intake from dairy products and virtually no osteoporosis while those countires with the highest intake of dairy products have the highest incidence of osteoporosis. Food for thought....
I was relieved to read (as well as later hear from a specialist I consulted in the UK) that bone density machines (DEXA) can tell nothing about the quality of a patient's bones. So being diagnosed with low bone density, as many healthy people are, does not necessarily mean a person's bones are "poor quality" bones, structurally.
I'm sure that in the coming years a lot more will be known about osteoporosis and the long term affect of drug treatments currently available to combat this disease. So before you jump on the band wagon of fear and embark on drug treatments which may do more harm than good in the long run, I highly recommend that you read this book first.