負離子
市面上的負離子手環之類的產品有效嗎?
下面為之前關於你提的這個負離子產品的幾篇文章
供你參考:http://tw.knowledge.yahoo.com/question/question?qid=1508061410018http://tw.knowledge.yahoo.com/question/question?qid=1509020305245http://tw.knowledge.yahoo.com/question/question?qid=1406072313335http://tw.knowledge.yahoo.com/question/question?qid=1008091508103http://tw.knowledge.yahoo.com/question/question?qid=1206052701122http://www.youwinhealth.com/topic.asp?topic_id=563
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