Muscle Milk is a caseinate protein, and Nitro Gen Xtreme is a Whey Protein Isolate.Muscle milk isnt a bad product, but it has a tone of flaws.Instead of using Milk Isolate, they use Alpha and Beta cassientes.A casseinate is a cheaper form of Milk Isolate, usually around 70 % protein versus, Isolate at 90% protein.Plus Muscle milk has 18 grams of fat and only 32 grams of protein.There fat is from MCT'S which is fat found in cocunut oil and butter.Mct oil can cause cramping and is not as good as flax or CLA.Now is Muscle Milk changed the protein to Milk Isolate, now your talking .Milk Isolate is the single best protein out there.Its not as good as combination proteins, such as Milk Isolate, Whey Isolate, and Egg white combined.Milk Isolate has the highest naturally occuring L-Glutamine 22.3% versus Whey Protein Isolate at only 19.1 % naturaly occurring L-Glutamine.Plus Milk Isolate has the best sustainted release factor, because it naturally curdles in the stomach.Milk Isolate is the closing thin g to mothers milk, and has been used in trauma patients for years.Also if Muscle Milk lowered the amount of fat they use, and changed the fat to flax, or even CLA.
Now Nitro GEN Xtreme is a great product aswell, because its one of the only Time released Whey Protein Isolate on the market, plus it has 10 grams of L-Glutamine per serving.It has 60 grams of protein and only 5 grams of carbs in 2 1/2 scoops.My personal opinion I would use our Lean Mass which has Milk Isolate ,Whey Isolate, and Egwwhite protein, plus 10 grams of L-Gluamine per serving.It has alot braoder spectrum of amino acids then any other protein out there.But if you like vWhey the Nitro Gen Xtreme is a great product as well.The only reason Whey protein Isolate is so popular is because it has the fastest breakdown in digestion, and its very clean.Its the best protein right after training, but it doesnt time release as well as Milk Isolate