In protein supplements, the powder that you have is usually an isolate, concentrate or mixture of the two. They come from the same source, but they are slightly different.
Concentrates are not as pure of a protein and are a fair amount cheaper than isolates. They are only about 70% protein, and have a higher fat content than isolates. Isolates are about 90-95% protein and are more costly. But they are also a much more quality protein supplement than concentrates. In terms of whey protein, a very popular type of protein, concentrates have a higher amount of lactose in them, because whey is a milk protein. Not that this is bad, but it is better for those who are lactose intolerant to take an isolate whey protein supplement.
In the end, both are good and will provide you with the protein you want, its just that the isolate proteins are much higher quality and much more pure.
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