What Chemical Do Bananas Give Off? A Deep Dive into Ethylene
                                
                                
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                                    5 min read                                
                            
                                According to the Academy of Nutrition and Dietetics, a medium-sized banana provides 9% of your daily potassium needs, but its nutritional profile changes as it ripens due to a colorless, odorless gas it emits. This crucial plant hormone, known as ethylene, is the primary driver behind the fruit's transformation from green and starchy to yellow and sweet.