Other healthy options are beans, legumes (lentils and peanut butter), and soy foods such as tofu or soymilk.ProteinsillustrationA Closer LookTalking to your MDSelf CareDiet - full liquidLow-residue fiber dietYour diet after gastric bypass surgeryDiet after gastric banding Tests for Protein in dietRelated InformationAmino acidsBileLipoprotein-a