Concentrating nutrients in breast milk may be achieved using an apparatus comprising a first sheet of material comprising a forward osmotic membrane, a second sheet of material sealed to the first sheet of material about a common outer perimeter thereof, the first sheet of material arranged so that water can traverse the forward osmotic membrane to an interior of the first and second sheets, and a dry carbohydrate within the interior of the first and second sheets exhibiting an osmotic draw property to draw water from un-concentrated, expressed human milk to form concentrated human milk. After a predetermined time, or upon the milk remaining after drawing of water through the membrane being a desired amount, the water draw can end.
