혈소판과 혈청에 존재하며 혈관을 수축시키고 뇌에서 기분, 수면, 식욕 등을 조절하는 신경 전달 물질의 하나.
A chemical compound that acts as a neurotransmitter in the brain and a vasoconstrictor in the blood, primarily responsible for regulating mood, sleep, and appetite.
예문:
"Low levels of serotonin in the brain are often associated with depression and anxiety."
"Exposure to sunlight can naturally increase the production of serotonin, improving one's mood."
"Certain foods contain tryptophan, an amino acid that the body uses to synthesize serotonin."