Why am I so tired if I don't have coffee? A guide to non-caffeine fatigue
                                
                                
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                                    4 min read                                
                            
                                According to the CDC, over a third of U.S. adults report not getting enough sleep on a regular basis, which is a major contributor to fatigue. If you've recently quit coffee and are wondering why you're still tired, the answer likely lies in addressing these underlying factors rather than reaching for another stimulant.