It is very, very difficult to build muscle in a caloric deprivation state....regardless of what the supplement companies claim. If you are well muscled and need to peel off the layers of fat you will be ok...but trying to lose fat and build muscle are contradictory actions in your body.
You may already know that most bodybuilders have a bulking stage followed by a cutting stage. They eat like no other while bulking and training heavy to build muscle and then go into a calorie deficit and up the cardio and try to maintain the hard earned muscle.
It's difficult. Good luck.