How can i gain weight all around fast ? i already eat a lot. for example, would eating protien bars work ?

Weight Gain: Begin weight resistance training three times a week, fatigue each muscle group you target and have two protein type shakes a day, no more than 15 grams of protein in each drink. Try the nutrabullett and the various recipes they offer. Best wishes.

Monitor: Monitor your intake and output with your physical activity. There are phone applications you can use which can help you keep a log of your activity and caloric intake. Increase your caloric intake and keep a log of your caloric intake. One of the apps i know if is myfitnesspal.