It is widely believed now that whey protein isolate is the best choice, because it is whey protein in its purest form. However, there are some people who do better with a whey protein concentrate. Whey protein isolates do not contain any lactose, fat, or carbohydrates. While this may be great for someone who is in good shape already, it really isn't necessarily the best choice for someone who needs to build muscle and gain a little weight as well.
In this case, the whey protein concentrate is indeed the better choice. Whey protein concentrates do have little fat and cholesterol, but also have a high amount of carbohydrates.
It is important to note that while whey protein isolate has about 90 to 89 difference between a whey protein isolate and a quality whey protein concentrate, the difference in cost is usually pretty great.
So, how much whey protein concentrate do you need? Most experts agree that 30 grams per day is adequate for athletes, including body builders. Do not listen to those quacks that tell you to take 1 gram per 1 pound of body weight! This is too much whey protein concentrate, regardless of whether you are an athlete or not.
Whey protein concentrate should not be taken in its original packaged form. It should be mixed with a liquid, such as fruit juice, but it should not be mixed with a dairy product, like milk. Also, you may not want to start at the full 30 grams per day. Instead, you may want to work up to that, so that you don't risk constipation and other side effects.
With all of that said, however, one must be cautious about using whey protein concentrate products. These products are considered high dairy products, and if you are lactose intolerant, you may have serious problems with a whey protein concentrate, and may need to opt for a whey protein isolate instead.
