In agreement with this, studies have found no difference in 11C‐DASB BP between participants with and without obesity,100 and with other tracers targeting SERT, no correlation between BMI and 123I‐labeled 2β‐carboxymethoxy‐3β‐(4‐iodophenyl)tropane (123I‐nor‐β‐CIT) BP across participants without and with obesity,96, 101 nor correlation of BMI with midbrain/cerebellum ratio of 123I‐(2‐((2‐([dimethylamino]methyl)phenyl)thio)‐5‐iodophenylamine (123I‐ADAM) BP across participants without obesity and participants with severe obesity,102 indicating that SERT is unaltered in obesity. This evidence concerns the gene SLC6A4 and obesity due to melanocortin 4 receptor deficiency.