AbstractCommentary by: Dr James Kimpton and Dr Teck Khong Clinical Pharmacology, St George's, University of London, UKSeries Editor: Dr Teck Khong, DTB Associate Editor Clinical Pharmacology, St George's, University of London, UKCommentary on: Kraus WE, Bhapkar M, Huffman KM, et al. 2 years of calorie restriction and cardiometabolic (CALERIE): exploratory outcomes of a multicentre, phase 2, randomised controlled trial. Lancet Diabetes Endocrinol 2019; 7: 673–83