Does Espresso Lose Caffeine as It Sits? The Truth About Potency and Flavor
                                
                                
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                                    4 min read                                
                            
                                Caffeine is a remarkably stable chemical compound that does not easily degrade, even when brewed. As a result, the common belief that espresso loses caffeine as it sits is largely a misconception, as the real loss is in the flavor and aroma compounds, not the potency.