Whey protein: This is a by product produced by the process of turning milk into cheese. It's known for its excellent amino acid profile and rapid digestion value. To get the best benefits - consume this type after a workout or breakfast.
Casein protein: This also has an excellent amino acid profile but since casein is digested into the bloodstream slowly, it's not suitable for pre or post workouts. To get the best benefits - consume at anytime of the day, but not breakfast or immediate after a workout, as your body needs protein fast at this point and as I said earlier it's digested slowly.
Protein Blends: Generally a combination of several types of protein and this also includes casein and soy proteins. Protein blend is great, providing the full range and spectrum of proteins from all types, the jack of all trades in the protein world. To get the best benefits - use it between your main meals and after a workout.
Whey hydrolysates: It is also known as petides, it's the quickest absorbed protein around, as the body prefers peptides to anything else in the protein world. It's highest in the essential amino acids due to the very low heat produced as its being made. This type is the best prior, during and immediately after a workout as it enters the bloodstream quicker then any other type of protein. Now, I'm not one for drink protein 30 minutes before and during workout. I don't seem to need it but understand why some bodybuilders do it, but I'm against it myself.
Soy Protein: Soy again is a fast digested protein and contains substantial amounts of amino acids. It is one of the most controversial of the protein powders and I have heard good and bad things about it. I will do an article on this at a later date, so look out for it! To get the best benefits - use in the same way a whey protein and protein blend, as people tend to use this type of protein in place of the others.
Money?
When it comes to money, protein shake or meal replacement tends to hit the pocket less in the long term than whole foods. They also make life easier when traveling around and it's also quicker than cooking food every three to four hours. I believe that we should get everything from whole foods and not use meal replacement or protein supplements but as it's extremely hard to do this with our lifestyles, it can be a means to an ends. All dietary protein should come from meat, poultry, eggs and fish I fell, as it a natural food source for the body. You shouldn't using protein supplement any more than three times per day. Now which one to buy? It all depends on what you need it for, but if you want to cover all the areas in your training, go with a protein blend (as it caters of everything you need in a protein powder). If you are looking to use just protein supplements around your training then Whey Hydrolysates is the way to go and if not Whey Protein (Isolate). For meal replacement casein is good, as it is slowly digested, giving you a nice release of protein over a few hours.
The bottom line is, I would go for a protein blend as it will give you a full spectrum of what protein is used for.
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