Advanced Diagnostics · Body Composition
A 10-minute, low-dose X-ray that measures fat, muscle, and bone with clinical precision. DEXA is the gold standard for body composition — and a clear way to track whether weight loss is protecting lean mass.
Why DEXA Matters
BMI and body weight cannot distinguish fat from muscle. Two people can weigh the same and have very different body fat, metabolic risk, and treatment needs.
DEXA shows what your weight is actually made of — making decisions far more precise.
What a DEXA scan reports
Four Metrics That Matter
Four numbers. One scan. Clear next steps.
Directly measures body fat — including subcutaneous and visceral fat — with ±1–2% accuracy.
Why it matters: metabolic riskThe fat around your organs. Strongly tied to insulin resistance and cardiovascular risk. Often concerning above ~100 cm².
Why it matters: visceral fatTracks lean mass by region so you can monitor aging, training, and muscle loss during weight loss.
Why it matters: lean massShows bone density with a T-score, helping catch low bone mass before fractures happen.
Why it matters: bone healthGLP-1 Weight Loss Programs
The scale can't show what you're losing. In STEP 1, up to 40% of semaglutide-related weight loss came from lean mass; tirzepatide was about 25% in SURMOUNT-1.
Losing muscle slows metabolism and makes regain more likely. DEXA shows whether your plan is reducing fat while preserving lean mass.
~40%
Semaglutide lean-mass share in STEP 1
~25%
Tirzepatide lean-mass share in SURMOUNT-1
How DEXA protects your GLP-1 results
Baseline before you start
Get a true starting point for lean mass, visceral fat, and bone density
Track what you're actually losing
Confirm fat loss vs. lean mass loss — the distinction that determines long-term success
Adjust the protocol
If lean mass is declining, your practitioner can modify training, protein, or dosing guidance
Document real progress
Fat loss, muscle gain, and visceral fat reduction — all quantified, not estimated
DEXA vs Everything Else
Most alternatives estimate. DEXA measures.
BMI
Cannot separate fat from muscle.
DEXA
Measures fat, muscle, bone, and visceral fat directly.
Bioimpedance (BIA)
Hydration-sensitive and inconsistent.
Skin Calipers
Operator-dependent and misses visceral fat.
Who Benefits
Useful far beyond osteoporosis screening.
Best before starting and during treatment to confirm fat loss, not muscle loss.
Annual tracking of lean mass, visceral fat, and bone density.
Helpful for early bone loss and rising visceral fat during perimenopause and menopause.
Shows whether training is building muscle and reveals regional imbalances.
Useful for tracking age-related muscle loss and sarcopenia risk.
Helpful when the scale is not explaining your results.
The Process
Book through Mend. We coordinate local DEXA imaging in the Flagstaff area.
In-person · Flagstaff areaLie still for about 10 minutes. No injections, no contrast, no prep, and very low radiation.
10 min · painless · no prepYour Mend practitioner reviews the report and gives clear next steps.
Personalized protocolFAQ
10 minutes. Four meaningful metrics. A practitioner-reviewed plan.
Body composition DEXA is different from a diagnostic osteoporosis scan. It is not meant to diagnose disease on its own. Radiation is very low (<10 microsieverts). Avoid during pregnancy and avoid contrast studies within 2 weeks.
This is an in-person service coordinated through Mend Medical in the Flagstaff area. HSA/FSA eligibility depends on use and ordering context. Formal osteoporosis screening is a separate indication.