Can You Drink Diet Soda on 75 Hard?
                                
                                
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                                    4 min read                                
                            
                                Created by entrepreneur Andy Frisella, the 75 Hard challenge is a mental toughness program with strict daily tasks designed to be completed for 75 consecutive days. The challenge includes adhering to a specific diet, and for many, this raises the question of whether diet soda is an acceptable beverage choice.