I am currently eating a low fat 2200 calorie a day diet consisting of mostly chicken and tuna with brown rice and steamed vegtables. There are times when I can't cook or don't have time to. Will using one of these shakes as long as it keeps within my calorie range hurt anything? I work out 5 days a week. 40 minutes of cardio 3 days and an hour and a half strength training 2 days a week. Weekends off. I have lost roughly 15 lbs since I started about a month ago.