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serotonin levels
serotonin 作定语修饰复数名词 levels 时，本身不加 -s。
Exercise can help maintain healthy serotonin levels.
运动有助于维持健康的血清素水平。
血清素；5-羟色胺
先理解核心含义，再看它在真实句子里的用法。
血清素；5-羟色胺
a neurotransmitter that helps regulate mood, sleep, appetite, and memory
Exercise can help maintain healthy serotonin levels.
运动有助于维持健康的血清素水平。
医学生理语境常用“血清素”，化学/药理学中常称“5-羟色胺”。
一种吲哚胺类神经递质(5-羟色胺),参与抑郁、食欲等的调节,对维持幸福感、安全感等至关重要
An indoleamine neurotransmitter, 5-hydroxytryptamine, that is involved in depression, appetite, etc., and is crucial in maintaining a sense of well-being, security, etc.
一种参与睡眠、抑郁和记忆的神经递质
a neurotransmitter involved in e.g. sleep and depression and memory
After a good workout, your brain releases serotonin, and you often feel calmer.
好好锻炼之后，你的大脑会释放血清素，你通常会感到更平静。
Serotonin is involved in many processes, including sleep, memory, and mood.
血清素参与许多过程，包括睡眠、记忆和情绪。
Some researchers believe that sunlight boosts serotonin, which may improve your mood.
一些研究者认为阳光会提升血清素，这可能会改善你的情绪。
serotonin 作定语修饰复数名词 levels 时，本身不加 -s。
Exercise can help maintain healthy serotonin levels.
运动有助于维持健康的血清素水平。
release 是及物动词，后面直接接 serotonin，不需要介词。
This medication helps release serotonin in the brain.
这种药物有助于在大脑中释放血清素。
lack 作名词时常用 a lack of sth 表示“缺乏某物”。
A lack of serotonin has been linked to depression.
缺乏血清素与抑郁症有关。
Not this
Drinking coffee can raise your seratonin level.
Use this
Drinking coffee can raise your serotonin level.
serotonin 的正确拼写是 s-e-r-o-t-o-n-i-n，中间是 o 不是 a；seratonin 是常见拼写错误，因此要改成 serotonin 才能准确表示“血清素”。
Not this
Serotonin is a chemical that is mainly produced in brain.
Use this
Serotonin is a chemical that is mainly produced in the brain.
brain 是可数名词，单数时前面一般要加 the；in the brain 表示“在大脑中”。中文“在脑”没有冠词，直译成 in brain 不符合英语习惯，所以要加上 the。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
血清素水平
Serotonin levels in the brain affect your mood.
大脑中的血清素水平影响你的情绪。
血清素再摄取
Many antidepressants work by blocking serotonin reuptake.
许多抗抑郁药通过阻断血清素再摄取来起作用。
血清素综合征
The patient was diagnosed with serotonin syndrome after taking too much medication.
该患者因服药过量被诊断为血清素综合征。
提升血清素
Exercise can help boost serotonin naturally.
运动有助于自然提升血清素。
血清素生成
The body needs tryptophan to support serotonin production.
身体需要色氨酸来支持血清素的生成。
血清素释放
Alcohol affects serotonin release in the brain.
酒精影响大脑中血清素的释放。
Use serotonin naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想记忆：serotonin 中的 sero 像血清（serum），它是调节睡眠与情绪的神经递质。
语域：neutral 常见场景：医学、生物学、科普文章 serotonin 是正式的科学术语，多用于医学、生物学文献或科普讨论中，日常口语里较少直接使用，常译为“血清素”。
有复数形式 serotonins。
Dictionary facts from ECDICT, WIKTIONARY.