Can apps keep transplant patients healthy? new study tests digital lifestyle coaching

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age ≥ 60 years * Liver or kidney transplant received at least 6 months and no more than 25 years prior * BMI between 21 and 29.9 * Signed informed consent * Having a personal smartphone * Stable immunosuppressive therapy in the past 3 months Exclusion Criteria: * Significant weight change (\>5% of body weight) in the past 3 months * Combined liver-kidney transplant * Medical conditions requiring specific diets that may render adherence to the dietary recommendations of the trial unsafe (e.g., chronic kidney disease, inflammatory bowel disease, celiac disease, bariatric surgery, etc.) * General physical conditions deemed by the investigator to contraindicate safe participation in any of the trial activities (e.g., blindness, vertebral fractures, wheelchair dependence, home oxygen therapy, etc.) * Adherence to specific dietary regimens for ethical and/or religious reasons that are incompatible with the dietary recommendations of this trial * Active malignant tumors currently under pharmacological treatment or awaiting surgical treatment (except cutaneous squamous cell carcinomas), or history of malignant tumors within the last 5 years, except for hepatocellular carcinoma * Psychiatric comorbidities deemed by the investigator to potentially compromise safety and/or adherence, thereby risking biasing the results (e.g., schizophrenia, bipolar disorder, eating disorders, etc.) * Changes in glucose-lowering or lipid-lowering therapy during the 90 days prior to the enrollment visit * Active participation in another research or non-research program aimed at lifestyle modification * Any clinical condition, diagnosed or under diagnostic evaluation, that the investigator considers may compromise safety and/or a priori adherence to the intervention, with a potential risk of altering the study outcomes