I am 21 and weigh 116lb and am 5ft 8in. how can i gain weight i have been eating a good amount

Well, : Well, being that you are thin and can eat whatever you like, you are probably the envy of many of your family and friends. But being too thin and underweight can cause health issues too. You must eat a nutritious diet that has the right percentage of carbohydrates, proteins and fats. Also, if you want to gain weight and have a shapely body, then it is important to lift weights to build muscle. Incorporate strength training into your exercise routine. You can also try taking protein supplements to promote muscles healing and growth.

Eat healthy foods: that are high in calories. Eat 6 meals /day. Work on strength training to build large muscle groups. Work out w heavier weights w fewer repetitions. Sleep at least 8 to 9 hrs/night. Hydrate well w water. Foods to help w healthy weight gain: almonds, cashews, pecans, sunflower seeds, flax seeds, walnuts, hummus, avocados, granola, trail mix, dried fruits, protein shakes, protein bars, lean meats