Why are my vitamins turning black? A guide to discoloration causes
                                
                                
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                                    4 min read                                
                            
                                According to food scientists at Purdue University, studies have found that vitamins like B and C can lose potency and discolor significantly when exposed to high humidity. Understanding why are my vitamins turning black is essential for ensuring your supplements remain effective and safe to consume. This guide will explain the chemical reactions at play and provide practical advice for preventing spoilage.