According to researchers by eating all this things in copper utensils or vessel's, eating or drinking leads to loss rather than advantages. Such foods like yogurt contains high amount of calcium, magnesium, protein, vitamin D and potassium. When the curd is placed in a copper vessel, then it becomes converted into poison . The nutrient present in the acts as a reactive food poisoning from copper.
Along with this , there is problem like jaundice, diarrhea, vomiting. Besides water kept in the copper is considered is very healthy to our body but if we at any kind of food or fruite in a cooper vessel's, it is harmful for our body.