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Who We Are.
Lifelong transformation through metabolic science and human connection™.
Comprehensive Three-Phase Metabolic Health System.
Our comprehensive system blends science with support for a one-of-a-kind, actionable approach to health ownership.
How We Got Here.
Grounded in the physician-founded legacy of Medifast, we began in doctors' offices and were recommended by thousands of healthcare providers.
When results from our clinical trial showed clients with ongoing coach support lose up to 10x more weight**, it reinforced our coach-driven model that merged nutrition with behavior change.
Since 2017, we’ve impacted 3+ million lives.
All along, weight loss was never the whole story, just the most visible one.
Today, with Trilivy™, we champion a comprehensive three-phase metabolic health system and carry forward 40+ years of innovation and impact.
Our timeline
From clinical roots to a proven system, guided by decades of research and real-world outcomes.
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1980s
Clinical Roots Take Hold
Our founding physicians pioneer proprietary structured nutrition to address obesity in clinical settings.
Today
Nearly Half a Century Later
More than 40 years of scientific rigor and clinical heritage guide our system, crafted by experts, refined through research — including our clinical trial, the gold standard — and proven by decades of real-world outcomes.
**Those on the Reset 5&1 Plan with support of a Trilivy Coach successfully lost 10x more weight and 17x more fat than those who tried to lose weight on their own.
Arterburn LM, Coleman CD, Kiel J, et al. Randomized controlled trial assessing two commercial weight loss programs in adults with overweight or obesity. Obes Sci Pract. Feb 2019;5(1):3-14. doi:10.1002/osp4.312.
Built on Legacy.
Designed for What's Next.
From our medical origins to the coach-driven model of today, our foundation is strong, trusted and measurable.
Trilivy is not just a program you follow. It’s a framework that resets your body, mind, and finances in a way that can rewrite entire lives—not just numbers on a scale.
Our People
In a world of automation and AI, human connection is our superpower.
Our Scientific & Clinical Affairs and Research & Development teams work alongside our Scientific Advisory Board to bring a human-centered, evidence-based approach to all we do.
Together with coaches, 90% of whom were first clients, our team of powerhouse people champion metabolic health through solutions that transform more than just the number on the scale.
Coach Spotlights
Tiffany H.
coach/client · 9 years · 72K lives impacted
Believes you’re only as good as your bad days.
Read Story“From 22 years of yo-yo dieting to almost a decade of freedom in every area of life.”
Melissa T.
coach/client · 7 years · 31K lives impacted
Believes this system works 100% of the time for 100% of people who follow at 100%.
Read Story“I lost 50 pounds.* Five months is all it took to change everything.”
Kristen G.
coach/client · 7 years · 67K lives impacted
Believes in starting from where you are & building from there.
Read Story“85 lbs* gone. Health restored. Confidence rebuilt. Tools that support my whole self — body, mind and spirit.”
Anna M.
coach/client · 4 years · 1.5K lives impacted
Believes it’s not always linear. It’s definitely not always easy. But it’s worth it. Every single time.
Read Story“If you keep doing what you’ve always done, you’ll keep getting the results you’ve always gotten.”
Natalie M.
Coach/client · 7 years · 4.2K lives impacted
Believes in structure, support, and a strategy you can actually stick to.
Read Story“A weight loss program is only as good as the habits you learn while doing it.”
This is Health By Design.
Tired of treating disease (not preventing it) as a critical care physician, Dr. Wayne Scott Andersen, aka Dr. A, walked away from traditional medicine to build something better.
More than a decade ago, he challenged the norm and created a new path to health through habit formation.
Dr. A used his expertise in behavioral health to develop the Habits of Health Transformational System, which translates complex ideas into clear steps that build self-efficacy and support sustainable lifestyle changes.
as seen on
Comprehensive Three-Phase Metabolic Health System.
Physician-founded, refined through research, and designed by decades of real-world outcomes.
3+ Million Lives Impacted.
Whole-person health empowering you to re-write your story.
Science Informs, Coaches Transform.
Get better results with support — up to 10x more weight loss with a coach.**
**Those on the Reset 5&1 with support of an Trilivy coach successfully lost 10x more weight and 17x more fat than those who tried to lose weight on their own.
Arterburn LM, Coleman CD, Kiel J, et al. Randomized controlled trial assessing two commercial weight loss programs in adults with overweight or obesity. Obes Sci Pract. Feb 2019;5(1):3-14. doi:10.1002/osp4.312.
