A combination of Blessed Thistle and Red Raspberry tea will increase milk supply. Marshmallow root tea has also been used successfully to accomplish this. You also need to make sure you are drinking lots of pure water to build milk with - your milk supply will drop off if you become dehydrated. Quite often, when a baby goes through growth spurts, it will take a day or two for your milk supply to catch up, but if you will nurse on demand, make sure your nutrition is good and supplement with the teas, your milk will catch up.