What does a bone density scan measure?

A bone density scan, often called a DEXA scan, measures the mineral content of bone, usually at the hip and spine. It uses a very low dose of radiation and is quick and painless.

It is used to assess whether bone has thinned to a degree associated with a higher risk of fracture. It is more commonly offered after menopause, at older ages, after a fracture from a minor fall, or where a medicine or condition is known to affect bone.

The result describes a risk rather than a certainty, and what to do about it depends on your other risk factors. That includes whether anything about your diet, activity or medicines is contributing, which is a discussion for the clinician who arranged it.