Depends on the cause: Several things can make it hard to gain weight. The main ones are inadequate intake of calories, need for hydrochloric acid &/or digestive enzymes, malabsorption, inflammation of the intestines (possibly from intestinal parasites), celiac disease & other food allergies, vitamin/mineral/amino acid deficiencies & hyperthyroidism. Meds that address the cause should help.See a good doc for evaluation.
Answered 8/5/2015
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