“睡前喝牛奶有助睡眠”的说法由来已久。为了改善睡眠状况，不少人都有睡前喝热牛奶的习惯。但喝牛奶真的能让我们睡得更好吗？牛奶助眠是一种心理安慰，还是有科学依据？我们来一起探究牛奶与睡眠的关系吧。
May help some people fall asleep faster
喝牛奶可能让一部分人更快入睡
A handful of small animal and human studies demonstrate that consuming dairy products like milk and cheese before bed may help some people have a more restful night's sleep, though the reason why remains1 unclear.
一些对小动物和人类的研究表明，睡前饮用牛奶和食用奶酪等乳制品可以帮助一些人睡得更安稳，但原因尚不清楚。
Most experts agree that milk's sleep-promoting potential is likely related to specific chemical compounds or the psychological effects of having a soothing2 bedtime routine — or perhaps a combination of the two.
大多数专家认为，牛奶促进睡眠可能与某些化学物质有关，也可能与这一放松的睡前习惯所产生的的心理效应有关，或者两者兼而有之。
May promote healthy sleep cycles
促进健康的睡眠周期
Certain compounds in milk — specifically tryptophan and melatonin — may help you fall asleep.
牛奶中的某些化合物，特别是色氨酸和褪黑素可以帮助你入睡。
Tryptophan is an amino acid found in a variety of protein-containing foods. It plays an important role in the production of the ne
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