To see how far lifestyle medicine interventions have moved from “adjunct” to essential, one needed to look no further than the main stage of the American College of Lifestyle Medicine (ACLM) 2025.

Sharing the podium with ACLM President Padmaja Patel, MD, were current and past presidents of the American Medical Association, the American College of Obstetricians and Gynecologists, the Obesity Medicine Association, the American College of Sports Medicine, and the American Psychiatric Association.

These leaders — collectively representing more than 400,000 physicians, researchers, interdisciplinary healthcare professionals, and trainees — spoke candidly about the need to anchor modern medical practice with lifestyle interventions to achieve “root cause-centered” care. Some of these leaders are already board certified in lifestyle medicine. Others are preparing to sit for the exam within the next year.

Putting Evidence Into Practice

Across 78 clinical practice guidelines, spanning cardiovascular disease, diabetes, autoimmune disorders, digestive disease, oncology care, and management of overweight and obesity, lifestyle interventions are recommended as first line and foundational. Yet most clinicians have not traditionally practiced that way.

For the most part, lifestyle advice is offered with good intentions — but usually as an afterthought. A brief mention to “eat better, exercise more, sleep well,” delivered without structure or support, and overshadowed by the immediacy of prescriptions and procedures.

The message from leaders across the healthcare sector at ACLM 2025 was clear. When clinicians systematically implement the six pillars of lifestyle medicine — whole food, plant-predominant nutrition; physical activity; sleep; stress management; social connection; and avoidance of risky substances — patients improve. Frequently, they improve faster than with conventional treatments, often more sustainably, and sometimes with a reversal of chronic diseases.

Sharing the Story of Lifestyle Medicine

In plenary sessions, breakout rooms, poster halls, and hallway discussions, clinicians from primary care to oncology showcased how adopting lifestyle medicine has changed their practice — and changed patient outcomes.

Kaushik Reddy, MD, an interventionalist at the James A. Haley Veterans Affairs Medical Center and the University of South Florida in Tampa, Florida, and Ajay Joseph, MD, a cardiologist from a large healthcare system in Tulsa, Oklahoma, presented case after case of patients’ lives altered through prescriptions for lifestyle medicine interventions: patients with refractory angina who regained functional capacity alongside medication de-escalation, patients deteriorating after multiple stents and bypass procedures whose symptoms stabilized or improved, and patients with escalating metabolic disease on multidrug regimens whose A1c and low-density lipoprotein levels fell with the addition of therapeutic lifestyle interventions.

Sharing the story of Jeff, a patient with multivessel disease who presented for angioplasty or stent placement every year for 10 years because of unstable chest pain, Joseph was stunned by the benefits after Jeff participated in a pilot program in 2022.

“Our pilot program cost us about $500 per patient,” Joseph said. “That one $500 intervention has so far prevented at least three hospitalizations and stent procedures for Jeff, each costing almost $15,000.”

These stories echoed a broader trend: Clinicians are using lifestyle medicine as a therapeutic intervention alongside traditional practice with beneficial clinical outcomes, applicable across disciplines.

A Unifying Theory of Lifestyle Medicine

Dean Ornish, MD, whose landmark trials in the 1990s first demonstrated the reversal of coronary artery disease through comprehensive lifestyle change, reflected on the momentum with a mixture of satisfaction and urgency.

“We tend to think of advances in medicine as being a new drug or a new laser or something really high tech and expensive,” Ornish told me. “And I think our unique contribution has been using these very high-tech, expensive, state-of-the-art scientific measures to prove how powerful these very simple and low-tech and often low-cost interventions can be.”

Ornish spent decades gathering evidence of the benefits of intensive lifestyle interventions for a variety of conditions from coronary artery disease to early-stage prostate cancer, and most recently, dementia.

At the meeting, he presented results from a randomized controlled trial of patients with early Alzheimer’s disease. Over 20 weeks, participants who adopted intensive lifestyle changes showed significant improvements in cognition and function on three standard measures used as part of FDA clinical trials, whereas the control group continued to decline. The study also found that amyloid deposition, measured through the amyloid-beta 42/40 ratio, improved in a dose-response correlation to the degree of lifestyle change.

“When you look at the whole picture, this is the first randomized control trial showing any intervention that can often stop and reverse the progression of dementia due to early-stage to Alzheimer’s disease,” Ornish said.

This strengthens what Ornish calls the unifying theory of lifestyle medicine. Most chronic diseases — cardiometabolic, certain cancers, and certain forms of dementia — share at least some, and often many, of the same underlying biological mechanisms. What we eat, how much we exercise, and how much social support we have play a critical role in chronic inflammation, oxidative stress, changes in the microbiome, and overstimulation of the sympathetic nervous system during times of stress.

And these pathways are very dynamic. People can get sick quickly, and they can also get better very quickly. But as with the early Alzheimer’s intervention, Ornish explains that the dose makes all the difference.

“It was a very intensive intervention,” Ornish said. “We know from our prior studies that the reason we were the first to show we could reverse all these different diseases is that it’s hard. You have to make really big changes.”

Lifestyle Medicine as an Opportunity Multiplier

Walter Willett, MD, DrPH, whose decades of work at the Harvard T.H. Chan School of Public Health in Boston have shaped global nutrition science, spoke about lifestyle medicine, particularly nutrition interventions as opportunity multipliers.

Lifestyle medicine improves personal health, dramatically reduces healthcare costs, and benefits planetary health, Willett said.

He pointed to robust global food systems data in the most recent 2025 EAT-LANCET Commission report that described how population-level shifts to plant-predominant dietary patterns can reduce the risk for chronic disease while lowering emissions, land use, and demand for water.

A Grassroots Movement Becomes a Global Profession

The conference highlighted the extraordinary expansion of an education and implementation infrastructure for lifestyle medicine as follows:

• Over 15,000 ACLM members from 95 countries
• 193 lifestyle medicine interest groups in academic and healthcare institutions throughout the US
• More than 450 US residency programs integrating lifestyle medicine curricula
• Over 115 US healthcare systems in the ACLM Health Systems Council
• Demand for lifestyle medicine board certification at an all-time high 

These numbers reflect a profession that has moved beyond a small group of early adopters to a global medical specialty with a shared competency framework, board certification, research base, and an expanding workforce pipeline.

The introduction of a new Blue Zones Certification for clinicians, announced just prior to the convening, extends lifestyle medicine from the clinic into community settings — providing a pathway for physicians to design and support environments that make healthy lifestyles the default in their home communities.

From Buzzword to Practice

Across sessions on artificial intelligence, value-based payment, health system transformation, food-as-medicine programs, women’s and men’s health, cancer recovery, sleep optimization, and behavior change, the focus remained consistent: implementation at scale to cross the chasm from niche specialty to health system transformation.

During her address, Patel ticked off many of the wins that have helped move lifestyle medicine from buzzword to practice — from the introduction of a new International Classification of Diseases, 10 Revision, code for diabetes remission, integration of assessment tools for lifestyle medicine into the EPIC electronic health records systems of 300 healthcare systems, to ongoing work with the Centers for Medicare & Medicaid Services to advance optimal models of care in the field.

With a nod to the compelling evidence base for optimal lifestyle medicine interventions to reverse disease, prevent illness, promote health, decrease burnout in clinician teams, deescalate medication utilization, and address the healthcare cost crisis, Patel highlighted the rapid growth of interest in lifestyle medicine. At a time when many other medical professional societies are seeing memberships decline, ACLM membership has tripled since 2019.

“This is what momentum looks like,” Patel said. “We can become the operating system to transform healthcare.”

Pathak is a member of the board of the American College of Lifestyle Medicine.