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They are the miracle pills that shouldn39;t really work at all. Placebos come in all shapes and sizes, but they contain no active ingredient. Now they are being shown to help treat pain, depression and even alleviate some of the symptoms of Parkinson39;s disease. Horizon explores why they work, and how we could all benefit from the hidden power of the placebo.如果您喜欢免费短视频（yaya.vodpond.cc）分享的《安慰剂的魔力》，别忘了推荐给你的好友！
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