He actually didn't mention it and I didn't think to ask because at that time I didn't realize how important protein was for gaining weight and also for gaining muscle. But I've asked my trainer and did lots of searching on the body builder website and other health sites. It's based off of your weight. I don't know how much you weigh, but if you're about my weight, start off with around 60 grams of protein a day then each week bump it up. That'll be easier on your tummy than just jumping right into 90 grams a day. But you don't need that much unless your weight training. Without weight training, it's going to be harder for you to gain weight & gain weight in the right places instead of just your tummy.
By the way, protein makes you gassy & it makes the gas just downright smell like roadkill that was set on fire then got a dirty diaper & Indian food dumped on it. Lol. It's not the kind of gas that causes pain or anything, it just makes you toot a lot. Just make sure to drink a lot of water to help that.
Also, Gas X isn't what you want. All that does is combine all the little gas bubbles into larger gas bubbles to make the gas go away quicker, but it doesn't prevent gas. The only thing that prevents gas is actually Beano, so just drop it in some water in the morning or before you eat.
Once your body gets used to the extra protein, the gas will calm down. In the beginning, it's no fun for ANYONE, so grab some Beano. Haha