Clinicians know that their patients' health is determined not just by the care they receive but also factors outside the confines of medicine employment, financial stability, safe housing and access to nutritious food, to name a few. Boston Medical Center ... is well ahead of the curve; 23 years ago, it began its first "food as medicine" program. Patients identified as having food insecurity receive a food "prescription," meaning they could visit a food pantry run by the hospital once every two weeks and receive boxes customized for their medical conditions. Latchman Hiralall, manager of BMC's Preventive Food Pantry, explained that clinicians give a referral to the program, so workers know whether the patient requires a diet for diabetes, kidney disease, autoimmune conditions and so forth. Eligible patients can walk in right away, chat with pantry staff and leave with a wide array of food. Crucially, it's patients who decide what food they take. Eligibility is simply a matter of answering yes to two questions about whether they are worried about getting enough food. They don't need to show proof of financial stress. The program serves about 6,800 patients, distributing 50,000 pounds of food a month. The source of much of the fresh produce: The hospital itself. That's right " BMC operates its own rooftop farm. Seventy percent of the vegetables grown there go to Preventive Food Pantry participants. A portion of the rest is served in the hospital cafeteria.