Can I Take the Cotton Out of My Vitamins? The Definitive Guide
                                
                                
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                                    4 min read                                
                            
                                According to the National Institutes of Health, keeping the cotton in a vitamin bottle after opening is a common mistake and should be removed. The cotton ball is not meant to be a long-term desiccant and can actually draw moisture into the bottle, potentially damaging your vitamins.