Whey is a protein that contains a good amount of branched-chain amino acids. Whey also contains small proteins that increase blood flow to the muscles. To get the best protein powder for muscle building first you might notice that most whey protein products contain more than one type of whey that are –

• Whey protein isolate – It contains a large amount of protein at least 90 % protein. They have been further processed and thus have no fat or lactose.
• Whey protein hydrolysate- This protein absorbs faster and is considered to be pre-digested. This whey protein that has already experienced partial hydrolysis, a process needed for the body to absorb protein.
• Whey protein concentrate- The percentage of protein available in this varies from 30 to 90%; it depends on how concentrated it is. This whey also contains low levels of carbohydrates and fat.

To know that your protein powder is good for you or not you can take the grams of protein per scoop listed on the supplement facts panel and divide it in grams. This will give you the percentage of protein in each serving. To be thought of a great whey protein powder, the percentage of protein per scoop should be 80% or greater.