Time Limited Eating in Type 1 Diabetes

This will be a two-armed study with an intervention and control group. Feasibility and acceptability will be assessed by using questionnaires. Safety will be indicated by hypoglycemia occurrence. β-cell function and insulin sensitivity will be evaluated using mixed meal tolerance test with C-peptide and glucose levels. Glycemic control will be indicated by continuous glucose monitor (CGM). Block randomization will be utilized to ensure the groups are balanced in terms of BMI. The study period will be 9 weeks in duration, including a week-long run-in period and an 8-week intervention period. There will be two in-person study visits at week 0 and week 9. Anthropometrics including weight, height, and pubertal status will be evaluated at these times. Group 1- Standard Care (control) * includes a minimum 12-hour feeding window for 7 days per week * no caloric restriction will be used * will wear a continuous glucose monitor Group 2 - TLE (intervention) * includes an 8-hour feed/16-hour fast for 7 days per week * will be instructed to consume all of their calories in the afternoon/evening period * can consume non-caloric beverages (water, tea, coffee) during the fasting period * will wear a continuous glucose monitor * no caloric restriction will be used