1. You weigh under 127 pounds
That usually means you have a small frame and a less hardy skeleton.
2. You have a family history of osteoporosis
If a relative has osteoporosis, there's a greater chance you'll get it too.
3. You've taken a prescription medication that can cause bone loss
These include some antacids, asthma medications, thyroid hormones, and cancer treatments.
4. You've broken one or more bones as an adult
A fracture may indicate your bones aren't as dense as they should be.
5. You've battled–or are still battling–anorexia or bulimia
Severe food restriction may rob your body of nutrients, accelerating bone loss.
6. You've missed your period three months in a row
If you're not pregnant or breast-feeding, this may signal your body is low on estrogen.
7. You smoke or drink more than two alcoholic beverages a day
These habits can lower your production of bone-protecting estrogen and interfere with calcium absorption.
8. You've been blue
Depression may increase your body's levels of an inflammatory protein that speeds bone loss, according to a recent study in the Archives of Internal Medicine.