DEXA Scan
A DEXA scan is a body-composition scan using low-dose X-rays to measure fat, muscle, and bone with high accuracy.
Published by Repit Fitness · Last updated
Key facts
- One of the most accurate composition methods.
- Measures fat, lean mass, and bone density.
- Can show regional fat distribution.
- Done at clinics — not an everyday tool.
DEXA (dual-energy X-ray absorptiometry) is considered a gold standard for measuring body composition. Using two low-dose X-ray beams, it distinguishes fat, lean tissue, and bone, producing a detailed breakdown — including where on your body fat and muscle are distributed.
Because it's accurate and detailed, a DEXA scan is great for an occasional, precise snapshot of your composition or for tracking changes over months. The trade-offs are cost and access: it requires a clinic visit, so it's not something you'd use weekly. For frequent tracking, simpler methods used consistently are more practical.
Frequently asked questions
How accurate is a DEXA scan?
It's among the most accurate widely available methods for body composition, clearly distinguishing fat, lean mass, and bone — more reliable than calipers or impedance scales.
How often should I get a DEXA scan?
Because of cost and access, every few months is typical — enough to track real composition change without overusing it. Use simpler tools for day-to-day tracking.
This article is general information, not medical advice. Talk to a doctor or registered dietitian before making changes if you have a health condition, are pregnant or take medication.
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