You say that hemp contains all known amino acids. I've been able to find that it contains all the 20 amino acids used in human metabolism, but there are over 500 known amino acids. Can you provide a source to substantiate the claim that it has all of them?
"Hemp protein is somewhat incomplete as even though it has all essential amino acids, some are present in inadequate quantity to provide the minimum amount required for essential human nutrition. The limiting amino acids in hemp protein appear to usually be lysine, and leucine and L-tryptophan being the second and third limiting amino acids."--http://medlicker.com/1013-hemp-protein