BCAAs, Glutamine, Leucine, Beta-Alanine, and several other types of amino acids seem to be sold as supplements these days. My question is if a person had to make a choice between all the amino acid supplements and could only choose one, which one should it be.
My friend supplements with Whey, a weight gainer, fish oil supplements, and creatine and can really only afford one type of amino acid. I recommended BCAAs to him but he is leaning towards Glutamine although I don't know why. Which is the most cost-effective choice in your opinions (most bang for your buck)?