Yeast is an excellent source of organic iron, natural B vitamins and protein. There are many sources and recipes for producing yeast. For example, liquid yeast is grown on herbs or honey malt, brewer's yeast is obtained from hops, and the most powerful type of yeast is whey, a product of cheese and milk processing.
Live baker's yeast should be avoided as its production is based on propagation in liquid nutrients. environments with bleach and sulfuric acid additives. The living cells in such yeast are killed by the heat treatment. It is not a problem to cook yeast at home - from dry or fresh hops,