A lot of protein powders spike their protein with glutamine so that they can say that a serving has a certain amount of protein. If the product has a label listing the different amino acids and the amount per serving, it will show you if it is spiked or not. However, the only way to know with certainty that the label is honest or not, is if the brand is third party tested. I’m not sure about Canada, but in the US this would be NSF certified or cGMP at minimum. A good protein powder to buy would be whey protein since they naturally already have the optimal protein ratios and more of the essential amino acids than other forms of protein