Whey concentrate undergoes a similar but cheaper version of filtration that forsakes the natural state of the protein during this rougher processing version. The filtration of whey concentrate primarily removes the water in the whey source, and leaves the protein, though lower quality, and the garbage that other filtration methods process out of their product. Whereas Isolate is processed with many measures in place to ensure that the proteins are processed delicately, exposed to low temperatures and a low acidic environment, whey concentrate is processing in a reckless amino acid damaging manner, under high temperatures and a poorly controlled acid environment. This prevents the proteins from optimally performing their function, and prevents you from gaining the full potential of their muscle synthesizing abilities. Whey concentrate is chock full of lactose and fat in their end product reducing the amount of bioavailability, or ease of your body’s use of it, and reducing the protein per serving ratio to no more than 80%, some are as low as 30%. Isolates are generally over 90%, and Physical Sciences has purified theirs to an astonishing 97%, with almost no lactose and fat to aid in digestion. Whey concentrate takes a bigger toll on your digestive system due to the content of lactose and fat, and is the main culprit in the bloated gassy feeling attributed to cheaper whey proteins. So you get what you pay for—which in the case of concentrate, you get “more” than the protein you pay for, such as fat, lactose, digestive problems, and ineffective protein bodies.