The subject invention provides therapeutic compositions, and uses thereof for the treatment or amelioration of symptoms of a disease selected from the group consisting of: Ebola virus infection, HIV infection, ataxia, environmental enteropathy, cancer, hangover, inflammatory disease, and porcine epidemic diarrhea. In preferred embodiments, the composition includes a combination of one or more amino acids selected from the group comprising lysine, aspartic acid, glycine, isoleucine, threonine, tyrosine, valine, tryptophan, asparagine and/or serine.