Hehe, I'm sorry to say-technically, hair can be used as soy sauce. Soy sauce is the product of protein decomposition, and the main component of hair is protein. There used to be a small soy sauce workshop that made soy sauce with hair. However, at present, large-scale production enterprises use soybeans, soybean meal and wheat as raw materials. Among them, the quality of soybean is the best, but the price is also more expensive (high cost).

Of course, you can't make monosodium glutamate in your hair.