Cooking as Medicine

Blog by Gary Sforzo and Margaret Moore with Claude AI

For years, health and well-being coaches have known something that mainstream medicine is only beginning to fully embrace, behavior change is the engine of lasting health transformation. A new study published in Obesity - a highly respected journal - offers compelling, rigorous evidence that combining culinary skills training with health coaching principles produces meaningful, sustained weight loss over a full year. And it does so remotely, affordably, and without a single prescription pad.

The article was selected to be featured by Obesity's May 2026 issue and also highlighted on Medscape. Here's what the science shows - and why it matters deeply for coaches, clients, and the future of lifestyle medicine.

The Study at a Glance

Conducted across two clinical centers - Spaulding Rehabilitation Hospital at Harvard Medical School in Boston and Sheba Medical Center in Israel - this bi-center randomized controlled trial enrolled adults aged 25–70 with BMIs between 27.5 and 35 kg/m². Participants cooked fewer than five home meals per week, making them a realistic proxy for the clients many of us work with every day.

Fifty participants in the intervention (n=24) and control (n=26) groups received dietary counseling focused on the Mediterranean diet. The intervention group received 12 weekly, one-on-one, 30-minute telehealth sessions that combined culinary training with health and well-being coaching. Coaches helped participants identify their home cooking vision, set weekly culinary goals, review progress, and develop skills through a guided self-discovery process. The control group received access to culinary resources on their own.

Body weight, nutrition, body composition, lipid profiles, cooking attitudes, and self-efficacy were measured at baseline, 3, 6, and 12 months.

The Results: Significant, Sustained, and Meaningful

The weight loss findings are significant, particularly for a behavioral intervention delivered entirely by telehealth without any weight loss medication. The intervention group lost an average of 3.23% of body weight at 3 months — more than double the control group's 0.71%. At 6 months, the intervention group reached an average loss of 4.2%, compared to just 1.22% in the control group. At 12 months, the intervention group maintained their losses at an average of 4.02%, while the control group gained weight slightly. The between-group difference at one year was 4.3%, a statistically and clinically meaningful gap.

Body composition data, analyzed through DXA scanning, reinforced the quality of the weight loss: the intervention group shed fat mass without significant loss of lean body mass. Fat loss without muscle loss is the signature of genuine metabolic improvement.

The study's authors noted that this weight loss is comparable to pharmacological agents like naltrexone/bupropion and exceeded the short-term results of other culinary medicine programs that required in-person teaching kitchens. This was accomplished through twelve half-hour telehealth coaching sessions.

The Coaching Piece: Not a Detail, but the Engine

Perhaps the most important aspect of this study for the Wellcoaches community is what distinguished the intervention: the integration of health and well-being coaching principles into the culinary training. Participants weren't simply taught recipes. They were guided through a self-discovery process. They set their own cooking visions and weekly goals. They reflected on progress. They built confidence through action - and through the relationship with a trained health and well-being coach.

Qualitative analyses from companion publications reveal that participants consistently named coaching elements - goal setting, planning, accountability, and growing confidence - as decisive factors in sustaining their new cooking habits. The culinary skills mattered. The coaching made those skills stick.

This is the central insight of Wellcoaches' work, validated once more by rigorous science: knowledge alone doesn't change behavior. The coaching relationship - built on autonomy, self-efficacy, and structured reflection - is what transforms intention into lasting action.

What Changed Nutritionally

The dietary changes tracked with coaching's individualized, goal-centered approach. Rather than uniform improvements across all measures, participants shifted meaningfully in ways aligned with their personal goals at different points in time. Mediterranean diet scores improved significantly at 3 months. Caloric intake dropped by an average of 452 calories per day at 6 months — a substantial reduction achieved without prescribed calorie counting. Consumption of commercial sweets declined significantly at 3 months and sweet beverages at 12 months.

Both groups reduced ultra-processed food intake and increased minimally processed food consumption over time, though the between-group differences were not statistically significant on NOVA classification measures. The authors suggest this may reflect the NOVA system's limits in detecting personal-level dietary change - an important nuance for coaches who know that individual food behavior is far more granular than broad classification systems can capture.

Cooking Confidence as a Health Outcome

One of the study's most practically useful findings concerns cooking self-efficacy. At 12 months, intervention group participants showed significantly improved confidence in cooking techniques and meal preparation. They reported greater skill in using knives, applying basic cooking methods, steaming, sautéing, stewing, and cooking from whole ingredients. These aren't trivial outcomes. They represent durable behavioral assets - capabilities that participants carry forward regardless of whether they're enrolled in a program.

This is exactly the kind of change that health and wellness coaches are trained to cultivate: not compliance, but capability. Not dependence, but self-direction.

Why This Matters for Our Field

This study arrives at a pivotal moment. GLP-1 receptor agonists are transforming obesity medicine, but they carry side effects, costs, and questions about long-term use. Lifestyle modification remains the first-line recommendation in major clinical guidelines. Yet the behavioral infrastructure to support that modification — the coaching, culinary skills, and sustained relationship — has rarely been studied with this level of scientific rigor.

This trial changes that. It demonstrates that a remote, coaching-integrated culinary medicine program can produce weight loss comparable to medication, sustain it over a full year, reduce fat mass without sacrificing muscle, and build lasting behavioral capacity — all through telehealth, without a teaching kitchen, using the core principles that health and wellness coaches practice every day.  We are proud to say that the Wellcoaches coaching protocol was used in this study, and first author Rani Polak is Wellcoaches-trained and a long-standing member of our Wellcoaches family.

For coaches advocating for the value of their work in healthcare systems, in lifestyle medicine programs, and in policy conversations about reimbursement and integration, this study is a gift. It speaks the language of medicine — randomized design, validated instruments, DXA scans, confidence intervals — while validating the science of coaching.

The kitchen, as it turns out, is a powerful coaching room. And the coach, it turns out, is essential medicine.

Polak R, et al. One-Year Weight Loss Following a Remote Culinary Medicine Program: A Bi-Center Randomized Controlled Trial. Obesity, 2026. https://doi.org/10.1002/oby.70193