DXA body composition & waist
Also known as:
Body composition scan, waist circumference, waist-to-height ratio
Measures fat, muscle and where fat sits, which matters more than weight alone.
Written and reviewed by Farhan Tahir, MD · Last reviewed
VIDEO LESSON
What they measure
A DXA body composition scan separates fat, lean and bone mass and estimates visceral fat. A tape measure at the waist captures abdominal fat for free.
Practical targets
• Waist-to-height ratio below 0.5 is a simple target for most adults
• Waist thresholds vary by sex and ancestry
• Track lean mass during weight loss to protect muscle
Good to know
The 2025 Lancet Commission recommends confirming excess adiposity with a waist measure or body composition, rather than BMI alone.
Key studies and references
Educational content only, written and reviewed by Farhan Tahir, MD. It does not replace individual medical advice. For sudden chest pain, trouble breathing or stroke symptoms, call 911.
AT A GLANCE
Test type
Liver & body composition
Also known as
Body composition scan, waist circumference, waist-to-height ratio
Reviewed by
Farhan Tahir, MD
Questions about your own care?
Dr. Tahir’s team offers consults through Youthful Medicine.
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