There are many important nutrients in your breastmilk. Levels of most of them are set by nature and are tailored to your baby’s needs, but there are a few that are affected by what you eat, like the nutrient DHA. DHA, or docosahexaenoic acid, is an omega-­‐3 fatty acid that is found in fish. DHA is important for brain, eye, and immune system development of your baby and may help support postpartum mental health for you.