Tips on how to gain some weight?

So basically.... EAT MOAR?
Obviously you're not gonna stuff your face with donuts but EAT MOAR still applies.

 

Eat more and take some mass gainer. There isn't much more science involved.

 

You have to be in a caloric surplus throughout the day consistently in order to gain weight. So if you normally eat about 2000 calories to sustain your weight then you need to eat 500-800+ more every day. Try to eat higher quality foods and look up a ratio of Carbs, proteins, and fats that best suits you.

 

Calorie dense foods like PB, Nuts etc search for them.