I have to take around 3000 calories a day to keep my muscles fueled, the problem is that I usually don't have the time to sit and eat 6 meals a day (I'm in the military) so I was wondering if it's ok to take say a weight gainer for example (like the GNC brand) which contains about 1800 calories in it to help me reach my daily calorie goal? Just wondering if that would be bad, or acceptable? I wouldn't let that drink replace all my meals, I still would eat breakfast, lunch and dinner. If I don't take at least 3000 calories, pounds just shed off of me overnight, so I thought this would be a cheaper alternative to eating so much.