Fenugreek, one of the ingredients in the blend, stimulates breast glands to produce more milk within 24 to 72 hours. Anise, another ingredient in the blend, supplies anethole which is a phytoestrogen compound that promotes milk production. Blessed Thistle, another ingredient, increases prolactin to stimulate break milk production. The other herbs in Lactation Blend work through these and other biochemical pathways to increase milk supply.