Are Sour Blueberries Okay to Eat? The Difference Between Tart and Spoiled
                                
                                
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                                    4 min read                                
                            
                                Blueberries are one of the healthiest fruits available, rich in antioxidants and vitamins. But if you've ever bitten into a surprisingly bitter one, you might ask: are sour blueberries okay to eat? The answer depends on whether they are simply underripe or spoiled.