Which is Healthier, Tuna Packed in Oil or Water?
                                
                                
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                                    4 min read                                
                            
                                According to the USDA, a 5-ounce can of drained tuna packed in oil can have more than double the calories of the same amount packed in water. Choosing which is healthier, tuna packed in oil or water, depends on your health goals and how you plan to use it.