Dried dairy products are milks, wheys and related foods dehydrated to low moisture powders with long shelf life, packaged in materials impermeable to water vapour, oxygen and light to protect them during storage. Spray drying dominates manufacture, and instantizing improves reconstitution. Quality specifications cover moisture, solubility index, scorched particles and microbial counts including Salmonella and Cronobacter, since these powders serve vulnerable consumers including infants. Bulk storage in cool, dry conditions preserves their functionality for recombining and ingredient use. Reconstitution instructions on pack help users achieve the intended solids content.