Purpose: To establish a whole food, egg, as a viable study material to supplement mothers and infants with nutrients that support optimal brain development. There will be 84 breastfeeding dyads, 3 months postnatal.

Mothers will be randomized to a whole egg or egg white (due to lack of an appropriate control food). Initial diet intake will be screened using the NDSR. Participants will come to the lab 3 times across 3 months (age 3 months, 4.5 months, and 6 months). Milk, saliva, and plasma will be collected from the mother, while saliva and plasma (heel stick) are collected from the infant. Diet data will be collected at each visit. The infant will complete a recognition memory test using electrophysiology at 6 months as well as the Bayley Scales of Infant Development at 4.5 months. The mother will complete a temperament questionnaire at 3 months and 6 months.

Inclusion Criteria:

• infant is 12-15 weeks of age at enrollment
• healthy, lactating mother age 18-35
• gave birth at >38 weeks gestation without remarkable incident
• consuming <=50% of the recommended amounts of 2 of the 3, DHA, choline, and lutein

Exclusion Criteria:

• infant with diagnosis or documented suspicion of developmental delay
• egg allergy or family history of egg allergy
• gestational diabetes
• any documented seizure activity

The participants will be given a jar of egg powder without labeling and they will not be aware of which they receive (egg white or whole egg).