DEXA Scan: The Gold Standard for Body Composition & Metabolic Health

DEXA (Dual-Energy X-ray Absorptiometry) is a medical imaging technology originally developed for measuring bone density. Today, it's recognised as the gold standard for comprehensive body composition analysis.

Unlike bathroom scales or bioelectrical impedance devices, DEXA uses two low-dose X-ray beams to precisely differentiate between bone, lean tissue (muscle), and fat tissue throughout your entire body.

Body Mass Index (BMI) is a crude calculation that divides your weight by your height squared. It tells you nothing about:

• How much of your weight is muscle vs fat
• Where your fat is distributed (subcutaneous vs visceral)
• Your bone health
• Whether you're "skinny fat" or metabolically healthy

The "Skinny Fat" Problem: You can have a "normal" BMI while carrying dangerous levels of visceral fat and insufficient muscle mass. Conversely, athletes are often classified as "overweight" by BMI despite having excellent metabolic health.

1. Total Body Fat Percentage

DEXA provides an accurate percentage of your total body fat, broken down by region. This is far more meaningful than weight alone.

Healthy Ranges:

• Men: 10-20%
• Women: 18-28%

2. Visceral Adipose Tissue (VAT)

This is the critical measurement that most testing misses. Visceral fat is the fat stored deep in your abdomen, surrounding your organs. Unlike subcutaneous fat (the fat you can pinch), visceral fat is:

• Metabolically active — It releases inflammatory cytokines
• Strongly linked to insulin resistance, type 2 diabetes, and cardiovascular disease
• Not visible from the outside — You can appear lean while harbouring dangerous VAT levels

DEXA quantifies your visceral fat in litres, allowing precise tracking over time.

Risk Categories:

• Below 0.5L: Low risk
• 0.5-1.0L: Moderate risk
• 1.0-2.0L: High risk
• Above 2.0L: Very high risk

3. Lean Muscle Mass & Distribution

DEXA measures your total lean mass and shows distribution across limbs and trunk. This reveals:

• Sarcopenia risk — Age-related muscle loss that accelerates metabolic decline
• Asymmetries — Muscle imbalances between left and right sides
• Appendicular Lean Mass Index (ALMI) — A key metric for metabolic health and longevity

Muscle is metabolic currency. The more muscle you have, the more glucose "sinks" available to clear blood sugar, the higher your resting metabolic rate, and the better your insulin sensitivity.

4. Bone Mineral Density (BMD)

DEXA was originally designed for this measurement. It assesses bone health at key sites (spine, hips) and provides:

• T-score — Comparison to healthy young adults
• Z-score — Comparison to age-matched peers

Early detection of bone density decline allows intervention before fractures occur.

One of the most valuable applications of DEXA is identifying metabolically unhealthy individuals who appear lean. This phenotype is characterised by:

• Normal or low BMI
• High visceral fat relative to total fat
• Low muscle mass
• Often accompanied by insulin resistance

These individuals are at significant metabolic risk but fly under the radar of conventional assessments. They're told they're "fine" because their weight is normal, yet they often experience:

• Persistent fatigue
• Difficulty building muscle despite exercise
• Stubborn abdominal fat
• Blood sugar dysregulation

At Metabolic Physio, we combine DEXA imaging with comprehensive blood chemistry analysis to build a complete metabolic picture:

| DEXA Finding | Blood Chemistry Correlation |

|--------------|---------------------------|

| High visceral fat | Often elevated HOMA-IR, hsCRP, triglycerides |

| Low muscle mass | May show elevated cortisol, low testosterone/DHEA |

| Poor bone density | Check Vitamin D, calcium, parathyroid hormone |

This integrated approach allows us to understand not just WHAT your body composition looks like, but WHY it developed that way—and what interventions will be most effective.

The scan itself is:

• Quick — 10-15 minutes total
• Non-invasive — You simply lie on a padded table
• Low radiation — Less than a day's background radiation
• No preparation required — No fasting, no special clothing

You'll receive a detailed report showing your fat mass, lean mass, bone density, and visceral fat levels, along with comparisons to healthy reference ranges.

DEXA body composition analysis is valuable for:

• Anyone starting a fat loss or muscle building program (establishes baseline)
• Those with "normal" weight but metabolic symptoms (fatigue, insulin resistance)
• Athletes wanting to optimise performance and track progress
• Individuals over 50 concerned about sarcopenia and bone health
• Anyone who's been told they're "fine" but doesn't feel fine

Our Metabolic Blueprint combines the 50+ biomarker blood panel with DEXA body composition analysis. This pairing reveals:

1. Your current metabolic state (blood chemistry)

2. How that state has manifested physically (DEXA)

3. Targeted interventions based on both datasets

If you're ready to move beyond the scale and understand your true metabolic health, the Metabolic Blueprint provides the forensic-level data needed to build an effective optimisation strategy.