whats the brand of weight gain shake youre using? a lot of the weight gainers will contain a shit load of simple carbs to get the total calorie count up, thats what makes it a "mass builder." anyone in this forum will lend their advice to say that you will want to up your main calorie intake to 3500-4500 per day. it should be divided into 6 to 7 meals at 500 or so calories per meal. I would say cut the "weight gainer" if thats what it is, and use Whey, Flax Oil, Peanut Butter, and Banana's for making your own shakes. That way at least you know whats in it. Other than that, youll just want to eat a LOT, but eat clean. Lots of chicken breasts, low fat cuts of beef, fish, etc. Youre going to want to try to get 250-300g of protein per day if possible. You will notice most likely a layer of subcutaneous fat over your stomach that could possibly build up a little, but not much. If youre seeing a bloated look to your stomach, its probably from sugar. Thats why I recommend dropping the weight gainer, its usually shitty and is just used for football players. If you want quality mass, with minimal "fat" gain, then just eat a lot of clean foods. It wont give you shredded abs but it certainly wont make your stomach stick out.