About
A different standard
A different standard
for bone health.
Cali Bone Builders exists to change how Bay Area adults think about aging, strength, and bone health.
Cali Bone Builders exists to change how Bay Area adults think about aging, strength, and bone health.
Doctor of Chiropractic. Clinical Nutritionist. National speaker. Twenty-five years prioritizing natural, drug-free healthcare in Walnut Creek.
Dr. Gary Yaeger founded Cali Bone Builders with a clear purpose: to give people a better option than passive advice and outdated solutions.
After 25 years of clinical practice — working with patients on auto-immune symptoms, headaches, digestive issues, low back pain, and the kind of "baffling ailments" most providers move past — one thing became clear to him. Most people weren't failing because they didn't care. They were failing because they weren't being given the right tools.
Bone health was the same pattern. The standard advice — walk, take calcium, "watch it" — quietly slows decline but rarely rebuilds strength. Osteogenic loading changed that.
Dr. Yaeger leads Cali Bone Builders with the calm authority of a clinician who has spent a career watching what works and what doesn't. He believes bone health deserves the same attention as heart health, brain health, and strength. He believes patients deserve clear data, honest guidance, and a path forward that respects their time and their bodies.
Your body's innate ability to sense, adapt, and heal is the foundation of your well-being. When functioning properly, it defends against stress and restores balance.
Our role is simple: help overcome the obstacles that hinder this ability and unlock your innate capacity to heal — for optimal health, strong bones, and a life you can keep living on your terms.
The right work, done at the right time, by the right hands.
The trainer behind every program. Where Dr. Yaeger sets clinical direction, Brennan brings each protocol to life — session by session, person by person.
As a certified trainer with extensive qualifications including AFAA, NRT, Senior Fitness, Stretching Fitness, TRX, and Group Fitness Instructor certifications, Brennan possesses a deep expertise in crafting personalized fitness plans that cater to the unique goals and needs of each client.
His meticulous approach to monitoring progress and adapting strategies ensures optimal outcomes, highlighting his dedication to the well-being of his clients.
Brennan's exceptional ability to work with clients across all ages and skill levels makes him a versatile and invaluable fitness professional. Whether guiding a novice through their first steps in fitness or enhancing the routine of a seasoned athlete, Brennan brings unwavering enthusiasm and expertise to every session.
In collaboration with Dr. Yaeger, Brennan integrates Nutrition Response Therapy into his programs, maximizing overall health and wellness. This holistic approach is especially impactful in his specialized osteoporosis and bone density strength programs, designed to safely build strength and improve bone health.
Our work is precise, intentional, and rooted in how bone tissue actually responds to load.
Schedule a consultation with Dr. Yaeger and the Cali Bone Builders team. Start with the data.
Same-day appointments available · Walnut Creek, CA