Time-Restricted Eating to Address Persistent Cancer-Related Fatigue

Inclusion criteria

• Have completed adjuvant chemotherapy, surgery, and/or radiation for cancer, including chemotherapy for hematologic neoplasms, at least 2 months and not more than 2 years prior to enrolling,
• Have a baseline level of fatigue, as determined by reporting a score of 4 or higher for the question, "In the last week, how bad was your worst fatigue on a scale from 0-10?"
• Be able to speak and/or read and write in English,
• Be at least 18 years old,
• Own a smartphone,
• Be willing and able to adhere to study procedures, including use of a smartphone app, and
• Be able to provide informed consent.

Exclusion criteria

• Already eat all their food within a window that is 10 h or shorter most (6/7) days of the week,
• Be underweight, as defined as a body mass index ≤18.5 kg/m2,
• Have surgery planned during the study duration,
• Have any contraindications to the proposed nutrition intervention as identified by their medical provider, their designee, or the study team (e.g., type 1 diabetes, risk for hypoglycemia, medication requirements, pregnancy, breastfeeding, recent history of an eating disorder),
• Be taking insulin, or
• Be on enteral or parenteral nutrition.