Bees require proper nutrition to produce new bees and to increase
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. (Example: the bees require 4% Iso-leucine. If the current feed you are using only has 3% Iso-leucine, the bees can only utilize 75% of the available protein.