My age is 20,sex male,wight 45kg. without gastric problem i dont have much problem. but i cant gain my wight much. what can i do now? should i take pedia sure, and if i should what type of pediasure i shoul take.

Other supplement : At your age if you want to use a supplement I'd choose one for adults such as Ensure or Boost. Of course, there is also just the old upping your caloric intake every day by 20%. Also, has doctor checked things like your thyroid function to make sure that's not your problem? Sounds like time to discuss concern with doctor and a good dietician!