Hydrolyzed protein is better then standard protein. However as said before different forms or for lack of a better word - types - of protein are used for specific training needs and goals. Hydrolyzed protein is simply broken down further so that your body does needs to do less processing of the protein to get the nutrients it needs. One thing to be aware of is that hydrolyzed protein contains MSG. I would not think that Casein protein would be used as an every day protein for someone looking for a simple recovery protein after a work out. Calcium Casseinate is a protein generally used by body builders who are also using some form of HGH - Human Growth Hormone - to get bigger gains and keep feeding the muscle. They use this protein not after a work out but generally a few hours after a work out before going to bed, reason being is that when you sleep your body releases it's natural HGH and this is when you actually get bigger, stronger faster etc. So you can see the benefits to getting a good night sleep. The biggest thing to remember about Casein proteins is that they have a very slow release rate, some 7-9hours and this is why it is best used when sleeping because the HGH can utilise the amino acids in the protein to their full potential. Some one not looking to "bulk" up would not generally use this protein as it can also give a bloating sort of effect, kind of like creatine where the body stores excess water in the muscle. You can get Hydrolyzed Whey Protein Isolate, ASN is one company that do it, this has a release rate of 30-60mins compared to 7-9hours, and would be much better suited to people wanting to replenish nutrients and stay lean. Casein could be used to stop binge snacking as it will keep you full for the time it takes to release. but then there is also chromium picolinate which will reduce carb cravings and also help regulate insulin levels, very good for diabetics, but any diabetics should consult their doctor before using this supplement.