Natto

“Water: 35 liters, Carbon: 20 kg, Ammonia: 4 liters, Lime:1.5 kg, Phosphrus: 800 g, salt: 250g, saltpeter:100g, Sulfer: 80g, Fluorine: 7.5 g, iron: 5.6 g, Silicon: 3g, and 15 other elements in small quantities.... thats the total chemical makeup of the average adult body. Modern science knows all of this, but there has never been a single example of succesful human trasmutation. It's like there's some missing ingredient..... Scientists have been trying to find it for hundreds of years, pouring tons of money into research, and to this day they don't have a theory. For that matter, the elements found in a human being is all junk that you can buy in any market with a child's allowence. Humans are pretty cheaply made.”
― Hiromu Arakawa, Fullmetal Alchemist, Vol. 1