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Co-Founder & Chief Medical Officer, NORTH Performance
Helping people reclaim the lives they love, and build bodies capable of carrying them even farther. That simple mission has guided Dr. Masi Reynolds throughout his career as a board-certified orthopedic sports medicine surgeon, regenerative medicine specialist, and co-founder of NORTH Performance.
Reynolds’ patients include Olympic medalists, world champions, professional athletes, founders, executives, military professionals, and active individuals from around the world, seeking more than a diagnosis. A trusted partner in building long-term health, resilience, performance, and quality of life.
Residency trained through Henry Ford Health, one of the nation's premier orthopedic programs, Reynolds completed advanced fellowship training in sports medicine and arthroscopic surgery at Sports Orthopedics and Rehabilitation (SOAR) refining his approach under internationally recognized mentors including Dr. Marc Philippon and Dr. Michael Dillingham. He has served as team physician for the San Francisco Giants, Santa Clara University, San Jose State University, and Oakland Roots SC, as well as adjunct faculty for Stanford sports medicine fellowship.
At NORTH, Reynolds brings his belief that exceptional outcomes require far more than technical excellence, they require an understanding of biology, movement, recovery, nutrition, and mindset — to the science behind our products. Developing evidence-based formulas that support longevity, recovery, resilience, and athletic performance for people who refuse to slow down.
For Dr. Reynolds, the true measure of success is helping someone return to the mountains they love, the waves they've missed, the adventures that still lie ahead. Quality of life is the north star. Everything else is simply a means of helping people live it fully.
…the true measure of success is helping someone return to the mountains they love, the waves they've missed, the adventures that still lie ahead.
Dr Masi Reynolds
Board-Certified Orthopedic Surgeon and Co-Founder & Chief Medical Officer, NORTH Performance
We are a community of inspired adventure athletes who believe performance doesn’t fade with time—it evolves. Together, we chase progress with intention, pushing our limits in the sports we love and building the strength, resilience, and longevity to keep going further, faster, and deeper into later life.
You’ve seen the science. You know the doses. You understand why every ingredient is there.
NORTH Performance was built for people who take their biology seriously — athletes, high performers, and anyone who wants to keep doing what they love at a high level for as long as possible. Foundation supports the daily biological infrastructure behind power, resilience, recovery, and long-term health. Ultra adds targeted support for training, output, and recovery during periods of higher demand. Together, they create a layered approach to human performance built around transparency, clinical dosing, and evidence-led formulation.
If you have questions about the science, ingredients, or how to use the system, reach out to us.
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