T. lutea F&M-M36 biomass also contains 0.6% (dry weight) of the carotenoid fucoxanthin [5,7]; fucoxanthin showed anti-obesity and anti-diabetic effects in mice by promoting the expression of the UCP1 and β3-adrenergic receptors in WAT [29,30,31]. Here, UCP1 is linked to obesity due to melanocortin 4 receptor deficiency.