how to gain weight fast

As someone who has always had difficulty gaining weight, mass gainers worked really well for me. I've always felt like I've had a disproportionately small appetite, even compared to people my size. For that reason, I just couldn't consume the necessary calories unless I walked around the house/work with a bowl of rice and chicken on me 24/7. Mass gainer helped me go from about 160 to 180 somewhat quickly and I'm hoping to someday get to 200 with around 17 percent body fat