Protein quality is determined by two factors: digestibility, and amino acid requirements of the species consuming the protein. Animals are different to humans, if you take human muscle tissue and eat that it should be the best source of protein for us humans to consume. This isnt possible but you can try to get close to this by mixing protein sources. For example if you were eating tuna fish at one meal and turkey at another, it would be better for your goals if you eat half turkey and half tuna fish for the first meal and the same for the second. Try and mix protein sources if you can. I always drink a glass of milk with my meals for this purpose alone and the extra calories when bulking. If you cannot mix sources so convenient, taking 3-6 grams of amino acids will be beneficial along with some milk and whole food source of protein. You should be able to find them much cheaper than $5 for 100 tabs of 200mgs that price is robbery. I buy 1000 tabs of 600mgs (of a similar product, Alf Alfa, Kelp & Yeast if I recall correctly but not 100%) for $15 and this is in United Kingdom, in USA you should find half that price.