For example, the susceptibility to obesity and T2DM is higher among people carrying genetic mutations of genes such as FTO (fat mass and obesity‐associated gene) or TCF7L2 (transcription factor 7‐like 2) if exposed to a high‐carbohydrate or high‐fat diet (Barrea et al. 2020). Here, FTO is linked to obesity due to melanocortin 4 receptor deficiency.