Does Slate Contain Caffeine? The Surprising Truth About the Rock vs. the Drink
                                
                                
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                                    4 min read                                
                            
                                According to the National Institutes of Health, caffeine is a natural substance derived exclusively from plants, not minerals. Therefore, the simple answer to 'does slate contain caffeine?' is no, the rock does not, as it is a geological formation and not a botanical one.