Water, 35 litres. Carbon, 20kg. Ammonia, 4 litres. Lime, 1.5kg. Phosphorus, 800g. Salt, 250g. Saltpeter, 100g. Sulfur, 80g. Fluorine, 7.5g. Iron, 5g. Silicon 3g. And trace amounts of fifteen other elements. Those are all the ingredients in the average adult human body.These ingredients can be bought on a child's allowance.Humans can be built pretty cheap, there's no magic to it.