The Precision Health Revolution

Sean Selters • July 9, 2025

Why Leading Functional Medicine Doctors Are Making DEXA Scans and Metabolic Testing Essential

How the practitioners you trust most are using advanced body composition analysis to unlock optimal health and longevity?

If you follow the work of Dr. Mark Hyman, Chris Kresser, Dr. David Jockers, Dr. Michael Ruscio, Dr. Kara Fitzgerald, or Dr. Peter Attia, you've likely heard them emphasize one crucial principle: you can't optimize what you don't measure.

These leading voices in functional medicine and longevity science aren't just talking about basic blood work anymore. They're advocating for a deeper level of precision health monitoring that goes far beyond what your bathroom scale can tell you—and it's revolutionizing how we approach wellness, aging, and disease prevention.

The Measurement Revolution in Functional Medicine
Dr. Mark Hyman puts it simply: "If you can afford and access a DEXA scan, I recommend an annual scan—since it not only measures body composition but bone mineral density." This isn't just casual advice from one of functional medicine's most respected voices—it's a fundamental shift in how we think about health assessment.

Similarly, Dr. Peter Attia, renowned longevity physician and author of "Outlive," considers DEXA scans so essential that he gets them annually and recommends them to virtually everyone. As he explains, "Everyone should get a DEXA scan" because the data provides critical insights into three key longevity markers that traditional health assessments miss entirely.

What These Experts Know That Most Don't
Beyond Body Weight: The Hidden Health Story
When Dr. Mark Hyman recently shared his own DEXA results on Instagram, he revealed something remarkable: "I got my DEXA body composition done to track my lean muscle mass and body fat. I am well below average body fat for my age (or any age!)" But here's what's crucial—this information would be completely invisible on a regular scale or BMI calculation.

Chris Kresser, a leading voice in ancestral health and functional medicine, emphasizes that DEXA scans are particularly valuable for understanding bone health in the context of dietary approaches like Paleo. His research into the microbiota-bone health connection shows how gut health directly impacts bone mineral density—insights that can only be tracked accurately through DEXA technology.

The Longevity Connection: What Dr. Peter Attia's Data Reveals
Dr. Peter Attia's approach to DEXA scans focuses on three critical metrics that predict longevity better than almost any other health marker:
  1. ALMI (Appendicular Lean Mass Index): Attia recommends aiming for at least the 75th percentile, ideally the 90th percentile or higher as you age. The research is clear—people with higher muscle mass live longer, healthier lives.
  2. Visceral Fat: Unlike subcutaneous fat, visceral fat drives inflammation and metabolic dysfunction. DEXA scans provide precise measurements that can guide targeted interventions. While a DEXA cannot measure visceral fat, it can give you your A/G ratio, which can indicate your likelihood of having higher visceral fat.
  3. Bone Mineral Density: As Dr. Attia notes, bone health is a critical component of healthy aging, and DEXA provides the gold standard for assessment.
The Metabolic Piece: Why RMR Testing Matters
Dr. David Jockers, a functional nutrition expert, emphasizes that understanding your metabolic rate is crucial for optimizing body composition and energy levels. Resting Metabolic Rate (RMR) testing reveals exactly how many calories your body burns at rest—information that's essential for:
  • Precision nutrition planning
  • Understanding metabolic health
  • Optimizing fat loss while preserving muscle
  • Identifying metabolic dysfunction early
Dr. Michael Ruscio, known for his evidence-based approach to functional medicine, discusses body composition in the context of overall health optimization. His research shows that "DXA (DEXA scan or dual energy x-ray absorptiometry)" provides insights that help practitioners develop more targeted, effective treatment protocols.

The Functional Medicine Advantage: Precision Over Guesswork
Dr. Kara Fitzgerald, a pioneer in epigenetics and biological age reversal, demonstrates how precise health measurements can literally turn back the biological clock. Her groundbreaking research showed participants could reverse their biological age by over 3 years in just 8 weeks—but this level of precision requires accurate baseline measurements and ongoing monitoring.

This is where the functional medicine approach differs dramatically from conventional healthcare. Instead of waiting for disease to develop, these practitioners use advanced diagnostics to:
  • Identify imbalances before they become pathology
  • Track the effectiveness of interventions with precision
  • Optimize health span, not just lifespan
  • Provide personalized recommendations based on individual data

Why Your Current Health Assessment Isn't Enough
Consider this scenario: Two people, both 45 years old, both weighing 150 pounds with "normal" BMIs. Traditional health assessments would consider them equivalent. But DEXA scans might reveal:
Person A:
High lean mass (75th percentile RSMI)
Low body fat
Strong bone density
Metabolically healthy
Person B:
Low lean mass (25th percentile RSMI)
High body fat
Declining bone density
Metabolically compromised

The difference in their health trajectories and longevity prospects would be dramatic—yet completely invisible without advanced body composition analysis.

The Local Solution: Precision Health Made Accessible
Here in Colorado, this level of precision health monitoring is now more accessible than ever. At Body Fat USA, we provide the same DEXA scanning technology that these leading practitioners recommend, along with comprehensive RMR testing—all at a fraction of the cost you'd find elsewhere.

Our DEXA scans ($80) provide:
Total body lean mass, fat mass, and bone density
Regional analysis (trunk, arms, legs)
Central abdominal fat measurement
Relative Skeletal Muscle Index (RSMI) calculations for longevity assessment
Precise tracking of body composition changes over time

Our RMR testing ($100) reveals:
Your exact resting metabolic rate
Estimated caloric needs for maintenance, fat loss, or muscle gain

Taking Action: Your Next Steps
The practitioners you trust most aren't just recommending these tests—they're using them personally and with their patients because the data drives better outcomes. As Dr. Mark Hyman emphasizes, this isn't about vanity metrics—it's about "the ultimate truth about body fat" and its impact on your health.

If you're ready to move beyond guesswork and into precision health:
Schedule your baseline DEXA scan to understand your current body composition and bone health. Add RMR testing to optimize your metabolic health and nutrition approach.

Create a tracking schedule (annual DEXA scans as recommended by these experts).

Work with qualified practitioners who understand how to interpret and act on this data.

The functional medicine revolution is built on one simple principle: better data leads to better outcomes. The practitioners you follow understand this—and now you can access the same level of precision health monitoring they recommend.

Ready to discover what your body composition reveals about your health and longevity?
Contact Body Fat USA today to schedule your DEXA scan and RMR testing, visit www.BodyFatUSA.com or CLICK HERE.


Because when it comes to your health, precision matters.

By Sean Selters June 25, 2025
Discover how Netflix's 'You Are What You Eat' sparked DEXA scan awareness. Get the same precise body composition testing as the twins for just $80 in Denver.
By Sean Selters June 18, 2025
Understanding Your DEXA Report: A Step-by-Step Breakdown Getting your DEXA scan results can feel overwhelming at first glance. All those numbers, percentages, and medical terms might seem confusing, but don't worry – we're here to break it down for you in simple, understandable language. Let's walk through your DEXA report step by step so you can make the most of this valuable health information. What Makes DEXA Scanning Special? Before diving into your results, it's important to understand why DEXA scanning is the gold standard for body composition analysis. Unlike other methods that estimate your body fat, DEXA measures every fat cell in your body – including fat in your brain, bone marrow, and organs. This is why DEXA body fat percentages are typically higher than other testing methods, but they're also the most accurate you can get outside of a hospital setting. Page 1: Your Body Composition Snapshot The Big Three Numbers Total Mass vs. Weight: You'll notice your report shows both "Total Mass" and "Weight." Your scale weight is what you see at home and is affected by gravity, while total mass is a constant scientific measurement. They're usually within a couple pounds of each other, and all calculations in your report use mass for precision. Lean Mass: This includes everything that is not fat or bone – your muscles, organs, cartilage, tendons, hydration, and even what's in your digestive system. The higher your "Tissue % Lean," the more muscular your body composition. Fat Mass: Simply put, this is just fat – nothing else. Your tissue vs. body fat percentage is calculated by dividing your fat mass by your total tissue mass (total mass, minus bone mass). Understanding Your Body Fat Percentage Your body fat percentage appears as "Region % Fat" in your report. Here are the ranges we recommend based on American Council on Exercise guidelines: For Men: Essential fat: 2-4% Athletes: 6-13% Fitness Enthusiasts: 14-17% Healthy Average: 18-24% Obese: 25% plus For Women: Essential fat: 10-12% Athletes: 14-20% Fitness Enthusiasts: 21-24% Healthy Average: 25-31% Obese: 32% plus Understanding Regional Analysis Android vs. Gynoid: The Apple and Pear Story Your DEXA report breaks down where you store fat, which is crucial for health assessment: Android Region (Belly Fat): This is your "apple shape" area. An android percentage higher than your gynoid percentage may indicate increased health risks. Gynoid Region (Hip Fat): This is your "pear shape" area, representing fat stored in your hips and thighs. A/G Ratio: A ratio over 1.0 means you store more fat in your belly than your hips. Combined with your overall body fat percentage, this helps assess potential health risks. Bone Health: Your T-Score and Z-Score Explained T-Score This compares your bone density to a healthy 30-year-old of the same sex and ethnicity (peak bone strength). Z-Score This compares your bone density to others your same age, sex, and ethnicity. It helps determine if your bone density is appropriate for your age group. Acceptable Range - Within the blue area Above Average - Within the dark green area Possible Osteopenia or Osteoporosis - Below the green area Metabolic Insights Resting Metabolic Rate (RMR) Your report includes an estimated RMR using the Harris-Benedict equation. This represents the calories your body burns just staying alive – maintaining body temperature, heartbeat, and breathing. Important note: This is a formula-based estimate, not your actual RMR. For your true metabolic rate, you'd need our separate RMR test. Relative Skeletal Muscle Index (RSMI) This measures your relative muscle mass using the Baumgartner equation. It's particularly important for assessing sarcopenia (muscle loss) as we age. Men should aim for above 7.26 kg/m², and women above 5.45 kg/m². Tracking Your Progress: The Trend Pages Body Composition History Your report includes a detailed history showing changes over time. Look for: Change vs. Baseline: How you compare to your first scan Change vs. Previous: How you've changed since your last scan This data is invaluable for tracking whether you're losing fat, gaining muscle, or both. Segmental Analysis This breaks down your body into regions (arms, legs, trunk) and shows: Fat distribution in each area Lean mass balance between right and left sides Changes over time in specific body regions Making Sense of the Assessment Section The final page provides checkboxes for various categories. This page is great if you are working with a doctor, nutritionist, and/or trainer. Nutritional Evaluation: Protein, mineral, and fat status Weight Management: Overall weight and body composition status Body Strength: Upper body, lower body, and overall muscle development Key Points to Remember Precision Matters: DEXA scanning has a margin of error of ±0.8% body fat for 68% of repeat scans. This is incredibly precise compared to other methods. Clothing Matters: The DEXA only reads everything on the table, including your tissue, fat, and bone and clothing. Try to mirror variables such as the clothing you wear with each scan. Context is Key: Your numbers should be viewed in context of your age, goals, and overall health picture. Trends Tell the Story: Single measurements are snapshots; trends over time reveal your true progress. What to Do with Your Results Understanding your DEXA report empowers you to: Set realistic body composition goals. We like use SMART ( S pecific, M easurable, A chievable, R elevant, T ime-based) Goals Track meaningful changes over time Identify areas that need attention (bone health, muscle balance, fat loss) Make informed decisions about your health and fitness journey Questions About Your Results? Remember, while this guide helps you understand the technical aspects of your report, we're always here to discuss your specific results and what they mean for your health journey. Email us at Info@BodyFatUSA.com with any questions regarding the data points on your DEXA Scan. Your DEXA scan is a powerful tool – use it to make informed decisions about your wellness goals. Ready to track your progress? Schedule your next DEXA scan to see how your body composition changes over time. Contact Body Fat USA visit www.bodyfatusa.com to book your appointment.
By Sean Selters June 11, 2025
DEXA vs. Other Body Fat Testing Methods: Why Accuracy Matters for Your Health Goals When it comes to measuring body fat percentage, not all methods are created equal. If you've been searching for "DEXA scan vs bioelectrical impedance" or wondering about the "most accurate body fat test," you're asking the right questions. Your body composition data should be precise enough to guide real health decisions – and that's where the differences between testing methods become crucial. The Body Fat Testing Landscape: Your Options Explained Bioelectrical Impedance Analysis (BIA) - The Convenient Choice Those handheld devices and smart scales use electrical currents to estimate body fat. While convenient, BIA results can vary dramatically based on: Hydration levels Recent meals Exercise timing Room temperature Menstrual cycle (for women) Accuracy Range: ±3-5% margin of error Bod Pod (Air Displacement) - The Chamber Method This egg-shaped chamber measures body volume to calculate density. While more accurate than BIA, it requires specific clothing and can be affected by: Body hair Tight-fitting clothing issues Claustrophobia concerns Limited availability Accuracy Range: ±2-3% margin of error Hydrostatic Weighing - The old "Gold Standard" Underwater weighing was once considered the gold standard, but it's uncomfortable, time-consuming, and requires: Complete submersion Exhaling all air from lungs Multiple attempts for accuracy Specialized facilities Accuracy Range: ±1-2% margin of error DEXA Scan - The True Gold Standard Dual-Energy X-ray Absorptiometry doesn't estimate – it measures. Unlike other methods that calculate based on assumptions, DEXA scans actually see and measure every fat cell in your body, including fat in your brain, bone marrow, and organs. Accuracy Range: ±0.8% margin of error Why DEXA Scan Accuracy Matters: Beyond the Numbers Complete Body Composition Picture While other methods give you a single body fat percentage, DEXA provides: Regional fat distribution (android vs. gynoid ratios) Lean muscle mass breakdown by body region Bone density measurements (BMD and BMC) Precision That Drives Results When you're tracking progress, a 3-5% margin of error (like with BIA) means you could lose 10 pounds of fat and not see it reflected in your results. DEXA's ±0.8% accuracy means you'll see real changes as they happen. Medical-Grade Reliability DEXA technology is the same used in hospitals and research facilities. At Body Fat USA, we use a GE Lunar Prodigy DEXA scanner – the same equipment trusted by medical professionals worldwide. The Science Behind DEXA Superiority How DEXA Actually Works DEXA uses two different energy X-ray beams that interact differently with bone, lean tissue, and fat. This allows for direct measurement rather than estimation based on electrical conductivity or body density assumptions. What Makes DEXA Different Direct measurement vs. estimation Measures all fat including internal organ fat Unaffected by hydration or recent meals Consistent results regardless of external factors Regional analysis shows exactly where fat is stored Real-World Accuracy Comparison Let's say your true body fat percentage is 20%. Here's how different methods might read: BIA Scale : Anywhere from 15-25% (depending on conditions) Bod Pod : 18-22% range Hydrostatic : 19-21% range DEXA : 19.2-20.8% range That precision matters when you're making decisions about nutrition, training, and health goals. When Accuracy Becomes Critical Athletic Performance Optimization Athletes need precise body composition data to optimize performance. A 3% margin of error could mean the difference between peak performance and suboptimal training decisions. Health Risk Assessment Your android/gynoid ratio (belly fat vs. hip fat distribution) is a crucial health indicator. Only DEXA provides this precise regional analysis that can indicate cardiovascular and metabolic health risks. Progress Tracking If you're working with a trainer, nutritionist, or following a specific program, accurate baseline measurements and progress tracking are essential for adjusting your approach. The Body Fat USA Advantage At Body Fat USA, we've made DEXA scanning accessible and affordable. Here's what sets us apart: Everyday Low DEXA pricing in Colorado at just $80 per scan Quick 15-20 minute sessions with immediate digital results GE Lunar Prodigy scanner with medical-grade accuracy Comprehensive reports explaining every measurement No insurance hassles – straightforward pricing Making the Right Choice for Your Goals Choose DEXA If You Want: The most accurate body fat measurement available Regional body composition analysis Bone density information Reliable progress tracking Medical-grade precision Consider Other Methods If: You need daily tracking (though this isn't recommended) Budget is the primary concern You're only looking for rough estimates Getting Started with DEXA at Body Fat USA Ready to get the most accurate picture of your body composition? Here's what to expect: Book your appointment online at www.BodyFatUSA.com or CLICK HERE to book now. Arrive in comfortable/light weight clothing (no metal objects) 15-20 minute appointment in our comfortable facility Immediate digital results delivered to your secure portal Supporting documentation to help you understand your data The Bottom Line on Body Fat Testing Accuracy When you're serious about your health and fitness goals, you need data you can trust. While other methods offer convenience or lower costs, only DEXA provides the medical-grade accuracy that makes a real difference in your results. At Body Fat USA, we believe everyone deserves access to the most accurate body composition testing available. That's why we've made DEXA scanning affordable and accessible in the Denver metro area. Ready to discover your true body composition? Book your DEXA scan today and experience the difference that real accuracy makes.
How are your workouts changing your body composition?
By Sean Selters February 8, 2025
Why get a DEXA Scan? Knowing how your diet and workouts are changing your body composition takes more than stepping on a scale. Get the data you deserve, to make the decisions about your health and fitness.