Hexadecenoylcarnitine (C16:1) levels in the blood have been associated with obesity in children [49], while positive effects of DHA on obesity risk and metabolic health have been noted by multiple studies [50, 51], with proposed mechanisms including suppression of fatty-acid synthesis, enhancement of fatty-acid β-oxidation and increase of the serum adiponectin level [52]. Here, ADIPOQ is linked to obesity due to melanocortin 4 receptor deficiency.