I am 29 years young and maybe 95 lbs, 5'1, desperately trying to gain atleast 15-20lbs but it's been very difficult. would boost or ensure drinks help?

Dietician: If you are in good health with no illnesses like diabetes, tapeworms, overactive thyroid,etc, have a one time consultation with a registered dietitian at your local hospital. You will have your eating habits critiqued, be told what your ideal weight should be, how many daily calories you should ingest according to your level of physical activity and will be given a healthy and proper diet for you.