Originally Posted by
94civicEX
Hmm, I want to disagree

h:, but since it's you, I'll have to give my reasoning.
Building muscle will allow you to burn more fat, so anything he can do to retain muscle will be beneficial to his overall fat burning.
Drinking the protein would even be better if it were in place of a meal.
Your reason makes perfect sense, but he'll be discourage because he won't see any weight lost. Lose the weight first through lots of cardio and weight lifting without the supplements.