The main ingredient of humans is water.
___________________________________________________
It is right.
35 liters of water, 20 kilograms of carbon, 4 liters of ammonia, 1.5 kilograms of calcium oxide, 800 grams of phosphorus, 250 grams of salt, sellers - 100 grams, 80 grams of sulfur, 7.5 grams of fluoride, 5 grams of iron and 3 grams of silicon. And 15 more elements. <...> From this consists the body of an average adult." Steel Alchemist)