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ObesityApril 2013Summary reviewed August 2026

Weight-Loss Program Helped 38% of People with Mental Illness Drop 5% of Their Weight

People with schizophrenia, bipolar disorder, and major depression often gain weight from their medications and face extra barriers to losing it. A program combining group coaching, individual support, and exercise helped them lose an average of 7 pounds over 18 months — and nearly 4 in 10 lost at least 5% of their starting weight.

What the trial was testing

The ACHIEVE enrolled 291 patients with obesity. The study was sponsored by Johns Hopkins University and tracked outcomes across the full group of patients who matched the trial's eligibility profile.

Researchers followed patients through treatment and into recovery, tracking the outcomes that mattered most for the disease being studied.

What the results showed

38% of participants lost 5% or more of their weight, compared to 23% in the control group.

The New England journal of medicine · 2013 · NCT00902694

These findings — that lost 5% or more of their weight vs. 23% in the control group — were published in the The New England journal of medicine and represent the headline result of the study.

Researchers tracked outcomes across 291 patients enrolled in the trial. The result was consistent enough across the group that the team felt confident reporting it.

What this means for patients

For patients with obesity, this result changes the calculus on what to ask their care team about. Whether it changes day-to-day care depends on factors like disease subtype, prior treatments, and where the patient is in their care journey.

What you can do now

If you take medication for a serious mental illness and are struggling with weight gain, this study shows that structured support can help. The program combined group sessions, one-on-one coaching, and exercise tailored to your needs. Ask your doctor or psychiatric clinic if they offer weight-management programs designed for people with mental health conditions — this approach is evidence-based and safe.

Eligibility for the treatments mentioned above depends on specific test results and clinical history. Bring this summary, the trial name, and your most recent labs or pathology report to your next visit.