Why do protein shakes leave a bad taste in the mouth?
                                
                                
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                                    6 min read                                
                            
                                According to user reviews and nutrition experts, a significant number of consumers report that protein shakes often leave an unpleasant aftertaste, which can make regular consumption a chore. This persistent issue, and the reasons why protein shakes leave a bad taste in the mouth, can be attributed to several factors including processing, ingredients, and preparation methods.