Comparing DEXA and BIA
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For the last 20 years, DEXA has been seen as the default best device to measure body composition. During that same span of time however, the technology behind BIA machines has advanced at a rapid rate. Early BIA (and modern cheaper commercial) machines suffer from poor accuracy and reliability due to using a single frequency measurement technique. Top tier modern BIA machines like the X ONE PRO rely on a much more robust multifrequency method, that many research studies have determined to be highly reliable and accurate in comparison to DEXA scans.
There are also some drawbacks to DEXA scans that most people are not aware of. Firstly, the DEXA machine is an XRay device, and as such exposes the body to radiation. The amount is not as high as a standard XRay however the use of DEXA has been restricted in certain populations (children, female patients who are or may possibly be pregnant). This also indicates that the frequency of DEXA scans needs to be limited to prevent excess exposure to radiation.
In contrast, BIA machines can be used with people of all ages and genders, and presents no exposure risk of radiation. The only individuals who cannot be scanned are those with an internal electronic device (pacemaker) or who have artificial joints. You can also get scanned as often as you like with no concern for damage to your health.
The table below summarizes some pros and cons of BIA and DEXA scans so that you can best decide which option fits your needs and goals.