TCF7L2 and type 1 diabetes mellitus: Our objective was to investigate the association between consumption of unprocessed and processed red meat and risk of LADA and T2D, and the potential interaction with FHD of T1D, T2D, and genotypes of HLA and TCF7L2. Furthermore, we aim to explore whether the associations may be mediated by effects of insulin resistance, beta cell function, or autoimmunity.