Whole milk contains considerable fat while skimmed milk has much less. It is porridge made of crushed wheat, jowar and boiled in skimmed milk. Skimmed milk also contains almost no vitamin A. Nutrition intake between whole milk drinkers and skimmed or low fat drinkers is different. They were left with a surplus of skimmed milk. The cream has now been "skimmed" or captured separately from the fresh milk. The juice was skimmed and then channeled to successively smaller kettles. This blend is allowed to slowly reduce while being frequently skimmed. If floating, dross can also be skimmed off. The floating layer can be either skimmed or frozen for later removal. The resulting bismuth dross can be skimmed off. The oil that is released is skimmed off, filtered, and pressed. The oil is skimmed off and purified. Once all the steel has been tapped, the slag is skimmed away. Oxidized contaminants float to the top of the melt and are skimmed off.