Bee-Pro pollen substitute contains the best nutrients available for the production of larval food. Amino acids are the building blocks of protein. Different protein sources contain different amino acid levels; and it's for this reason that a mixture of protein sources should be included in a pollen substitute. A correct amino acid balance is the key to efficient utilization of protein. Protein quality is determined by its level of essential amino acids. A shortage of any one essential amino acid makes overall protein utilization by the bee less efficient. Can be fed in dry form in a feeder box placed in the yard or made into patties by mixing with high fructose corn syrup or sugar syrup and placed in the hive.