DEXA Scans
Body composition testing in San Francisco. Measure body fat, lean tissue and visceral fat at DEXA SF, inside Custom Fit in Hayes Valley. Review your results with a Registered Dietitian or Exercise Physiologist.
1 scan: $150 · 2 scans: $199 · 4 scans: $349. Scans take place at 323 Octavia Street, San Francisco. Purchase your package, then schedule your appointment. Need a specific date? Call 415-891-7120 to check availability before paying.
What a DEXA Scan Measures
A DEXA (Dual-Energy X-ray Absorptiometry) body composition scan reports:
Total and regional body fat
Lean tissue mass
Visceral fat
Left-to-right lean tissue differences
Bone measurements as part of the body composition report
The scan takes about six minutes. Your results review helps you understand your baseline and use follow-up scans to track changes over time.
DEXA SF is located inside Custom Fit at 323 Octavia Street. Registered Dietitians or Exercise Physiologists explain your report and discuss how the findings relate to your fitness and nutrition goals.
Find out what you’re made of & get expert advice so you can reach your goals.
What You Get
Total and regional body composition results
Body fat, visceral fat and lean tissue measurements
Left-to-right lean tissue comparisons
Bone measurements within your body composition report
A results review with a Registered Dietitian or Exercise Physiologist
Our body composition scans are not for diagnosing osteoporosis or replacing a medical bone density examination.
Body Fat Assessment
Bone Density Analysis
Muscle Mass Evaluation
Metabolic and Skeletal Data
Meet your DEXA technicians
Get to know the people behind your scan. Our Custom Fit team brings experience in nutrition, exercise science, and personal training to your DEXA SF visit.
Evan Mather
Owner · Personal Trainer · DEXA Technician
Evan founded Custom Fit around individualized training and nutrition. His background spans water polo, powerlifting, and yoga, with an emphasis on movement quality and personal goals.
Mark Eaton
Director of Sports Performance & Testing · Exercise Physiologist · DEXA Technician
Mark combines exercise physiology with experience in gyms and physical therapy settings. His work connects fitness, wellness, and an understanding of human movement.
Credentials & education
- Certified Bone Densitometry Technologist (CBDT) — UC San Diego
- ACSM Certified Exercise Physiologist
- NASM Certified Personal Trainer
- BS, Kinesiology/Neuromuscular Science — San Francisco State University
- RunDNA Level 1 Gait Analyst
- American Red Cross CPR/AED
Pete Fonteneau
Personal Trainer · DEXA Technician
Pete uses testing and tracking to guide individualized training. His experience includes rehabilitation settings, group training, and athletic development, with a focus on lasting movement habits.
Credentials & education
- Certified Bone Densitometry Technologist (CBDT) — UC San Diego
- Bachelor’s degree in Kinesiology — Sonoma State University
Kai Samiere, RDN
Registered Dietitian · DEXA Technician · Operations Manager
Kai brings sports-nutrition experience with Stanford’s team and a personal passion for surfing. His approach connects evidence-based nutrition, consistency, and everyday performance.
Credentials & education
- Registered Dietitian — Commission on Dietetic Registration
- Certified Bone Densitometry Technologist (CBDT) — UC San Diego
- BS, Nutrition — California Polytechnic State University
- MS, Health and Wellness Management — Merrimack College
- Dietetic Internship, Sports Nutrition & Entrepreneurship — Wellness Workdays
Tarah Valenti, RDN
Registered Dietitian · DEXA Technician
Tarah’s background spans sports nutrition, clinical research, and private practice. She helps people explore practical behavior changes and overcome barriers to their health goals.
Credentials & education
- Registered Dietitian — Commission on Dietetic Registration
- Certified Bone Densitometry Technologist (CBDT)
- NASM Certified Personal Trainer
- BS, Dietetics — San Francisco State University
- Dietetic Internship — Cornell University
Part of the Custom Fit team.