What is the toxic compound in grapes?
                                
                                
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                                    5 min read                                
                            
                                For over two decades, veterinarians and toxicologists were baffled by the unpredictable and severe toxicity that grapes and raisins caused in some dogs. A landmark 2021 study finally pinpointed tartaric acid and its salt, potassium bitartrate, as the primary toxic compounds responsible. This discovery provides a long-awaited answer to the perplexing danger that grapes pose to canines.