Q: My goal is to lose fat, like a million other people. Is Cytosport Muscle Milk a suitable protien source to be used as a meal replacement once a day for effective fat burning?

A: Yup, once a day it should be perfectly good. Muscle Milk makes a good meal replacement since it has a lot of fats to go along with protein making it a complete meal.

Note that for that same reason Muscle Milk would NOT make a good protein supplement to go along with a meal because in a protein supplement you want to have near-pure protein without extra carbs or fats since you'd be getting those from the 'regular' food. But as a complete meal replacement, Muscle Milk works well.