Subset 2 - DXA Scans In addition to trial participation, Subset 2 (n = 50) be asked to provide fasting full body DXA scan at dedicated visits 1d, 14a, 25a, and 39 (weeks 0, 12, 48 and the one year post assisted weight maintenance visit respectively). The DXA scan will be used to assess changes in body composition during the trial.