Serotonin and melatonin, neurohormones for homeostasis, as novel
... seasonal timing, sexual development, the antioxidant defence system and immune response.24–26 Melatonin is synthesized from
tryptophan within the serotonin pathway mainly in the pineal
gland, and in a number of extrapineal organs such as retina, lens,
bone marrow, intestine, skin and so on.27 To dat ...