The short answer
DEXA is widely regarded as one of the most accurate and detailed ways to measure body composition, and its biggest strength is precision: scans repeated under similar conditions give very consistent results, which makes DEXA ideal for tracking change over time.
Compared with BMI, bioelectrical impedance (InBody-style scales), skinfold calipers and handheld body fat devices, DEXA provides far more detailed and consistent data—which is why it is used by researchers, physicians, professional and collegiate athletes, and military performance programs.
What affects your DEXA results?
No measurement is perfect. Hydration, a recent large meal, a hard workout and even clothing can shift results slightly—mostly in measured lean mass. To make your scans as comparable as possible:
- Scan at a similar time of day
- Keep meals and hydration similar
- Avoid exercise before the scan
- Wear similar, metal-free clothing
- Use the same scanner each time
Different DEXA machines and software can produce slightly different numbers, so tracking your trend on one scanner matters more than comparing results between facilities. Every Body Fat USA scan is performed on the same GE Lunar Prodigy.
Why DEXA body fat can read higher
DEXA often reports a few percentage points more body fat than other methods because it measures fat tissue throughout the body directly rather than estimating it from a formula. Focus on your own trend over time. DEXA vs. other methods
Related questions
Body Fat USA offers $85 DEXA body composition scans and $100 RMR metabolic tests in Denver (both for $175), with reports emailed in about 5 minutes. See all FAQs
