Infinite Health and Nutrition
FlagshipPremium coaching and health optimization built around labs, lifestyle, nutrition, and performance.
Learn MoreHealth · Performance · Identity
Dr. Jason Rannfeldt
Also known as Jason Rannfeldt and Jason Lee Rannfeldt
Health Performance Coach · Entrepreneur · Founder
Dr. Jason Rannfeldt is a health performance coach, entrepreneur, and founder helping individuals rebuild their health, energy, confidence, and identity through science-backed systems.
Est. 25+ Yrs
Authority
Dr. Jason Rannfeldt has worked with Olympic athletes, professionals, and individuals looking to rebuild their health and performance — combining elite coaching, nutrition, and human performance science into one integrated system.
25+
Years Experience
Olympic
& Professional Athlete Coaching
Health
Nutrition & Performance Systems
Founder
Infinite Health and Nutrition
About
About Dr. Jason Rannfeldt
Dr. Jason Rannfeldt, also known as Jason Rannfeldt and Jason Lee Rannfeldt, is a health performance coach and entrepreneur dedicated to helping individuals take control of their health and rebuild their lives.
Throughout his career, Jason Rannfeldt has combined science, coaching, nutrition, and lifestyle systems to help clients overcome challenges such as fatigue, inflammation, weight gain, and loss of identity.
Whether you know him as Dr. Jason Rannfeldt, Jason Lee Rannfeldt, or simply Dr. J, his mission is the same — give people a clear, proven system to rebuild their health, performance, and confidence for the long term.
Specialization
Areas of Focus
Six core disciplines, one integrated system for lasting transformation.
Human Performance Coaching
Personalized systems that elevate energy, output, recovery, and resilience for high performers.
Nutrition & Lifestyle Strategy
Sustainable nutrition and daily habits engineered around your body, schedule, and goals.
Autoimmune & Inflammation Support
Identify triggers, calm chronic inflammation, and rebuild a body that finally works with you.
Men's Health & Identity Rebuild
Reclaim strength, drive, focus, and confidence through structured rebuilding and accountability.
Weight Loss & Metabolic Health
Restore metabolic flexibility, lose fat, and protect long-term health without extremes.
Executive & High-Performance Coaching
Performance strategy for leaders who refuse to trade their health for their ambition.
Signature Work
Programs & Projects
Each program is purpose-built for a specific transformation — guided by science, structured by experience.
Crush 90
Men & DadsA 90-day rebuilding system for men and dads who want to regain identity, strength, drive, and confidence.
Learn MoreThrive 90
Women's ResetA health and lifestyle reset for women navigating inflammation, autoimmune symptoms, fatigue, and body changes.
Learn MoreInflammation Reset
Targeted ProtocolA practical system to reduce inflammation, identify triggers, and regain control of your health.
Learn MoreRebuild Your Health.
Reclaim Your Identity.
Restore Your Performance.
Dr. J's work is built around one core belief: people do not need more random information — they need a clear system, accountability, and a coach who understands how to turn small changes into lasting transformation.
Media & Content
Content from Dr. Jason Rannfeldt
A growing library of articles, podcasts, and videos from Jason Rannfeldt — built to make complex performance science usable.
Articles
Coming SoonPodcasts
Coming SoonVideos
Coming SoonCoaching Resources
Coming SoonWhy Dr. J
Why People Work with Dr. Jason Rannfeldt
Clients choose Jason Rannfeldt because the work is built on experience, science, and a system that actually changes how you live.
01
Decades of Experience
25+ years coaching Olympic athletes, professionals, executives, and everyday people committed to real change.
02
Systems-Based Approach
No fads. No guesswork. Dr. Jason Rannfeldt builds repeatable systems around nutrition, training, recovery, and lifestyle.
03
Real-World Results
Clients of Jason Rannfeldt rebuild energy, lose fat, calm inflammation, and reclaim confidence — without burning out.
04
Long-Term Transformation
Jason Lee Rannfeldt coaches for the next decade of your life, not the next 30 days. Identity-level change, built to last.
Frequently Asked
About Dr. Jason Rannfeldt
Common questions about Dr. Jason Rannfeldt, also known as Jason Rannfeldt and Jason Lee Rannfeldt.
Who is Dr. Jason Rannfeldt?
+
Dr. Jason Rannfeldt is a health performance coach, entrepreneur, and founder of Infinite Health and Nutrition with over 25 years of experience helping people rebuild their health, energy, performance, and identity through science-backed coaching systems.
Is Jason Rannfeldt the same person as Dr. Jason Rannfeldt?
+
Yes. Jason Rannfeldt, Dr. Jason Rannfeldt, Jason Lee Rannfeldt, and Dr. J all refer to the same person — health performance coach and founder of Infinite Health and Nutrition.
Is Jason Lee Rannfeldt the same as Jason Rannfeldt?
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Yes. Jason Lee Rannfeldt is the full name of Jason Rannfeldt, also known professionally as Dr. Jason Rannfeldt.
What does Dr. Jason Rannfeldt specialize in?
+
Human performance coaching, nutrition strategy, autoimmune and inflammation support, men's health, weight loss and metabolic health, and executive performance coaching.
Who does Jason Rannfeldt work with?
+
High performers, executives, professionals, athletes, dads, and individuals navigating fatigue, inflammation, weight challenges, or loss of identity — anyone serious about long-term transformation.
How can I work with Dr. Jason Rannfeldt?
+
Schedule a consultation directly at drjschedule.as.me or visit the Programs page to explore Infinite Health and Nutrition, Crush 90, Thrive 90, and the Inflammation Reset.
Begin
Start Rebuilding Today
Whether you are looking to improve your health, rebuild your energy, regain confidence, or explore coaching, the first step is a simple conversation.