In humans it affects circadian rhythms , sleep patterns ( melatonin levels increase at night ) , and is implicated in seasonal affective disorder 它影响人的生理时钟节奏,睡眠模式(褪黑激素水平在晚上增加) ,而暗示着周期性的情感紊乱。
When these impulses stop ( at night , when light no longer stimulates the hypothalamus ) , pineal inhibition ceases and melatonin is released 当这些电脉冲停止下来(在晚上,当光不再刺激视丘脑下部) ,松果体抑制停止就释放褪黑激素的时候。
Although melatonin has a significant effect on the human body , no definite conclusions have been reached about whether melatonin supplements are beneficial to health 尽管褪黑激素对人体影响这么大，可是服用褪黑激素制剂对人体是否有益尚无定论。
During nighttime sleep , melatonin levels in the body rise , reaching a peak between 11 pm and 2 am , and then drop dramatically when a new day dawns 人体在夜间睡眠时，会分泌大量的褪黑激素，通常在夜间11时至隔日凌晨2时分泌最为旺盛，清晨以后的分泌量则急遽下降。
Intake of other foods such as kelp , soy beans , pumpkin seeds , water melon seeds , almonds , peanuts , yeast , malt , and milk helps to increase the body s melatonin production 此外，摄取诸如海带黄豆南瓜子西瓜子杏仁果花生酵母麦芽牛奶等食物，也有助于褪黑激素的合成。
He said sunlight raises the level of melatonin ( the hormone that helps us keep rhythm with the seasons ) in a person ' s cerebral spinal f1uid , which in turn raises a person ' s spirits 阳光会使人体脑脊液里的褪黑激素(能使人跟上季节变换节奏的激素)升高，褪黑激素升高度过来会使人更有精神。
Melatonin production is related to age , increasing at three months after birth , peaking at the age of six , and beginning to drop after puberty . the effect of melatonin on the human body 褪黑激素在体内的浓度也与年有关，一般而言，自出生三个月后开始上升，六岁时达到最高峰，青春期之后，褪黑激素的浓度则随著年增长而下降。
Two studies in the u . s . have shown that bright light at night reduces melatonin production and induces estrogen secretion in women , which in turn increases the incidence of breast cancer among female night workers 美国有两项研究发现，深夜明亮的灯光会减低女性体内褪黑激素的分泌和增加雌激素的水平，这使得夜班工作的女性罹患乳癌的机率增加。
Melatonin production by the pineal gland is determined by the amount of light received , for the gland plays the role of a bodily clock , due to its sensitivity to light and regulation of the sleep - wake cycle 松果体会根据所接收到的光量多少来决定褪黑激素分泌的量，藉由对光的敏感度，松果体充当了人体内的一个时钟，掌控著每天苏醒和睡眠的时间。
However , when the eyes perceive light , melatonin production is reduced . this is why night workers and those who sleep with the light on have a lower immunity to disease and a higher propensity to develop cancer than others 可是一旦眼球见到光，褪黑激素的合成就会被抑制住了，这就是为什么夜班工作者深夜开灯睡觉者，免疫功能可能会下降，也较易罹癌的原因。
