早晨的一杯咖啡会让你心情愉悦吗

Preparing coffee and drinking a cup in the morning can be an excellent way to start the day. Something is soothing about the routine, and it feels great when the caffeine helps wake you up and lift you out of your sleepy fog. Do you ever feel like coffee just puts you in a better mood?

早上准备咖啡和喝杯咖啡是开始一天的绝佳方式。当咖啡因帮助你清醒过来，把你从困倦的迷雾中解脱出来时，你会感觉很棒。你有没有觉得咖啡能让你心情好一点?

According to WebMD, people in the United States drink more than 600 million cups of coffee every day. There are many health benefits from coffee, including reducing your risk of cancer, stroke, Parkinson's, dementia, and Alzheimer's. Typically, four cups of coffee can be safe, but more than that can have adverse effects, from increased anxiety to insomnia. On the other hand, you can have too much of a good thing.

据WebMD统计，美国人每天喝6亿多杯咖啡。咖啡对健康有很多好处，包括降低患癌症、中风、帕金森病、痴呆症和老年痴呆症的风险。一般来说，四杯咖啡是安全的，但超过四杯咖啡可能会产生从增加焦虑到失眠的一系列负面影响。另一方面，你可以拥有太多的好东西。

A typical cup of coffee contains 80 to 100 milligrams of caffeine, and don't forget decaf also contains a bit of caffeine — about two to 15 milligrams per cup. While 400 milligrams of caffeine — or four cups of coffee — is the maximum you should have a day, that can vary per person. Some people are more sensitive to caffeine and should have less. Finding how much coffee you should have in a day can be a trial and error process. If you experience symptoms of overuse of caffeine, like the jitters, cut down on the coffee (via the FDA).

一杯典型的咖啡含有80到100毫克的咖啡因，别忘了无咖啡因咖啡也含有一点咖啡因——大约每杯2到15毫克。虽然400毫克咖啡因——或者四杯咖啡——是你一天最多应该摄入的量，但每个人的摄入量可能会有所不同。有些人对咖啡因更敏感，应该少喝。找出你一天应该喝多少咖啡可能是一个反复试验的过程。如果你有过度使用咖啡因的症状，比如神经过敏，那么就少喝咖啡。

Does your morning cup of coffee put a smile on your face? You're not the only one, and there's science behind it.

早晨的一杯咖啡会让你的脸上绽放笑容吗?你不是唯一一个，这背后有科学依据。

A September 2015 review of seven studies with over 330,000 participants found that drinking coffee can significantly reduce the risk of depression. They found the best dose of caffeine between 68 and 509 milligrams a day — about one to five cups of coffee.

2015年9月，一项对超过33万参与者的七项研究的回顾发现，喝咖啡可以显著降低患抑郁症的风险。他们发现咖啡因的最佳剂量为每天68到509毫克，大约一到五杯咖啡。

Coffee can significantly improve your mood, according to an October 2018 study in Nutrients. Those who drank regular coffee had an improved mood compared to those who drank a cup of decaf or a placebo.

根据2018年10月《营养》杂志的一项研究，咖啡可以显著改善你的情绪。与喝一杯无咖啡因咖啡或安慰剂的人相比，喝普通咖啡的人的情绪有所改善。

Adenosine is a naturally occurring chemical found in all of your cells, and it makes you feel sleepy. Coffee blocks adenosine, so you feel more alert and ready to concur the day (via StatPearls).

腺苷是一种存在于所有细胞中的自然化学物质，它会让你感到困倦。咖啡会阻断腺苷，所以你会更清醒，准备好迎接新的一天。

Science confirms coffee is happiness in a mug. So enjoy your morning cup of coffee for these positive benefits.

科学证实咖啡是杯中的幸福，所以享受你的早晨咖啡吧。