Kobe_Whisky saidI have the same problem...I am so sensitive to lose the weight if I work out a lot...
It's genetic wit all members in my family..
right now, I am 5'7" with 140 lbs..i am also looking for supplement to gain more bulk muscles.
I eat a lot good food but the problem is body doesn't absorb the protein and vitamins well.
Unless you have a malabsorptive disease such as irritible bowel syndrome, Crohn's Disease, ulcerative colitis, or celiac, to name a few, all of which require a medical Dx, then this can be covered with diet education. If you are an alcoholic, you could also have problems absorbing vitamins because it disables vitamin transporters in the gut and destroys the absorptive mucosa.
Have you tried eating more nuts, seeds, dry milk/milk? How about some brown rice, quinoa, millet, buckwheat, oats? Dump some olive oil on it with some garlic and you have something that tastes good that is high in calories.