A agglomerated granular protein-rich nutritional supplement includes a mixture of one or more of: edible nutritional food proteins; edible carbohydrates; edible fats; edible dietary vitamins and minerals; edible amino acids; and edible plant extracts, where the nutritional supplement is agglomerated and granulated in an oral unit dosage form that is directly absorbable onto the tongue or rapidly dissolvable in an aqueous liquid. Specific formulations of the supplement are shown, for use by specific groups of individuals. Also shown are methods of supplementing the nutritional intake of various individuals engaged in various activities having various needs by orally administering a formulation of the protein-rich nutritional supplement. The nutritional supplement is in an oral unit dosage form of either agglomerated granules or a rapidly dissolvable wafer and may include a flavoring compound and an effervescing compound.