What is a good DEXA body composition result?

What a DEXA scan measures

A DEXA scan uses two low-dose X-ray beams to distinguish between tissue types, producing a surprisingly granular breakdown. Rather than one figure, you get several streams of data that describe both how much of each tissue you have and where it sits.

The headline outputs you will usually see on a report include:

• Body fat percentage - fat mass as a share of total weight
• Lean (fat-free) mass - muscle and other non-fat, non-bone tissue, often broken down by limb
• Bone density and a T-score - a measure of bone mineral density
• Visceral fat - the fat stored deep around the abdominal organs
• Regional and symmetry data - left-versus-right and arm-versus-leg comparisons

Reading body-fat percentage in general terms

There is no single 'correct' body-fat percentage - healthy ranges differ by sex and shift with age, and athletic and general-population figures are not the same. As a broad orientation only, often-cited general ranges put many men somewhere around 10–20% and many women around 18–28%, with women naturally carrying more essential fat.

Treat these as rough signposts rather than targets to chase. A figure outside a typical band is a prompt for context, not a verdict - body composition interacts with training, life stage and overall health, and is best discussed with a professional rather than judged against a chart in isolation.

What visceral fat means

Visceral fat is the fat packed around your internal organs, as opposed to the subcutaneous fat just under the skin. DEXA estimates it separately because where fat sits can matter as much as how much there is - visceral fat behaves differently from the fat you can pinch.

Many reports give visceral fat as a mass or volume estimate. Rather than fixating on one figure, it is generally most useful as something to watch over time and to raise with a clinician if it is high or rising, alongside markers such as your lipids and HbA1c. It is one input into a bigger picture, not a standalone diagnosis.

What a bone-density T-score broadly indicates

Bone density is reported as a T-score: how your bone mineral density compares with that of a healthy young adult, expressed in standard deviations. A score near zero is around the young-adult average; the further below zero, the lower the density relative to that reference.

Broadly, the World Health Organization frames a T-score at or above −1.0 as normal, between −1.0 and −2.5 as below the young-adult reference, and at or below −2.5 as notably low. These bands are a general framework, not a self-assessment tool - what a T-score means for you depends on your age, sex and risk factors, and is for a doctor to interpret and act on.

Why tracking change beats a single scan

A single DEXA scan is a useful baseline, but its real value emerges over time. Hydration, recent meals, training and even small differences in positioning can nudge a one-off result, so a lone number can mislead. The direction of travel across several scans is far more informative than any single snapshot.

This is where keeping your composition data alongside your other streams pays off. Watching lean mass, fat and visceral fat move in step with your training, nutrition and blood markers turns a printout into something you can actually learn from - and brings a clearer, trended picture to any conversation with a professional.