is whey protein bad for losing weight?

of course someone said to me that it was i'm 6' 240 and trying to get down to 200, every day that i workout(4-5 days/week) i drink designer whey protein after each workout, will this slow my weight loss down or help it out? help smart people pleeeeeeeease

This is a place where common sense and restraint should rule.  I  use (Life Extension) whey protein, but only when I've run really short on protein by the end of the day.  I'm on a low fat vegetarian diet, so when I'm on the run, I can't just grab some protein at the nearest fast food place. 

It is dehydrating, but all we have to do is drink extra water (assuming you aren't using too much).  If I remember correctly the biggest problem with "overdosing" on extra protein is that it can damage kidneys.  When I was young I went on an extremely high protein diet for several months.  Even though I drank a gallon of water a day I was rewarded with a kidney stone.  Not fun!

My trainer recommended I try the supplement.  He's also a registered nurse and is actually a "whole person" fitness expert.  I do trust his judgement.