Lecithin has been recommended to combat recurrent plugged ducts. The usual recommended dosage for recurrent plugged ducts is 3600-4800 mg lecithin per day, or 1 capsule (1200 milligram) 3-4 times per day. After a week or two with no blockage, mom can reduce the dosage by one capsule. If there is no blockage within another 2 weeks she can reduce it again by one. Mom may need to continue taking 1-2 capsules per day if stopping the lecithin leads to additional plugged ducts.
Lecithin is a very common food additive and is found naturally in many other foods. There are no known contraindications to its use by breastfeeding mothers.
The reason why lecithin may help resolve and prevent plugged ducts is not clear. Per Dr. Jack Newman, “It may do this by decreasing the viscosity (stickiness) of the milk by increasing the percentage of polyunsaturated fatty acids in the milk.” Lecithin is an emulsifier (used to keep fats/oils dispersed and in suspension): phospholipid molecules (such as lecithin) contain hydrophobic and hydrophilic elements; the hydrophobic portion has an affinity for fats and oils, and the hydrophilic portion has an affinity for water. **See the Kelly Mom website.