I see these "what's the best protein" threads all the time. I just replied to one in another sub-forum, so I figured I'd paste it here.
It's pretty easy to figure out the best value, and the most protein per dollar for whatever you want to use.
To find the amount of protein in a product:
Take the amount of protein (grams)in one serving and divide it by the serving size (in grams).
This is the percentage of protein in the product. The rest is filler (sweetener, flavoring and other crap).
To find the best VALUE:
Multiply the number of servings in the container by the grams in each serving. This gives you the total amount of product
Then take the total cost of the product, and divide it by the total amount of product.
This gives you the dollar per gram (or ounce, whatever)
Using these, one can figure out the most efficient way to stock up on expensive protein to meet their goals.
One can also use these to figure out the "Protein Efficiency" of milk, Cottage cheese, egg white products, etc.
Using the formula, it's pretty easy to figure out that any protein powder you get is less expensive than "real" protein (eggs, meat, cottage cheese, etc.) BUT ya GOTTA have REAL protein! remember, powders are called a SUPPLEMENT for a reason.
Here are two I've figured out as tough to beat using the above formulas.
Species Nutrition Isolyze has the most protein/least amount of filler per serving of any I've found, and I LOVE the taste. It's also REALLY expensive.
10 LB. Dymatize Elite is the best VALUE (dollar per gram of protein) of any I've found based on what I pay for it. Not sure I can post where and how much here though.