IGF1 and obesity due to melanocortin 4 receptor deficiency: Research has shown that individuals with obesity exhibit either normal or low serum IGF‐1 levels in the fasting state (Clasey et al., 2001; Gram et al., 2006; Juiz‐Valina et al., 2020; Juul, 2003; Lukanova et al., 2004; Tran et al., 2018).