A parent smiles as they hold a baby seated on a kitchen counter
April 12, 2021
By TLN

The nutritional guide for nursing parents: What to eat and what not to eat when breastfeeding

Clinically reviewed by: Demi Lucas, IBCLC
Last updated: November 29, 2024

Breastfeeding parents are busy people: Nursing every few hours, adjusting to a whole new sleep schedule, recovering from childbirth and whatever that may have entailed for you. So while you might be focused on your little one’s nutritional needs ahead of your own, it’s just as important that you properly nourish yourself — especially during this time. Here’s what to eat when breastfeeding… and what not to eat when breastfeeding.

Eat diverse, whole foods

In general, lactating parents can eat as they please, and do not need to eat or avoid specific foods. You may find, however, that certain foods help you heal faster and feel better. Protein in any form can give you an energy boost, whether that’s legumes paired with whole grains, eggs, or meat. Many parents find iron-rich foods like leafy greens and legumes helpful for building back iron stores. Hydration is also key. Staying hydrated is important for maintaining your breast milk supply, and it’s also essential for preventing lethargy, headaches, and weakness.

When thinking about what to eat, watch out for mercury

Although fish is a great source of protein and the vitamins and minerals a lactating parent needs, most oily fish contain some amount of mercury that can be passed to a baby via breast milk, affecting their brain and nervous system development. The FDA advises breastfeeding parents to eat a variety of fish (rather than the same fish over and over again) and follow the guidelines on this chart to ensure your mercury consumption is safe for your infant. And if you’re wondering “can you eat sushi while breastfeeding?” — the answer is yes! As long as you’re confident that your favorite sushi restaurant sources high-quality fish, and you remain conscious of mercury levels, you can still enjoy your favorite spicy salmon maki in moderation.

Monitor your caffeine consumption

Now the question every exhausted parent wants to know: Can you drink coffee while breastfeeding? In short, yes — but not too much. Caffeine is transferred to nursing infants through breast milk. Moderate amounts of caffeine found in a cup of coffee, energy drinks, soda, tea, and chocolate are safe to consume, but more than 300 milligrams of caffeine (the equivalent of 2-3 cups of coffee) could cause jitters, poor sleep, and irritability for your baby. Per the CDC, preterm and younger newborn infants break down caffeine extra slowly, so their parents might consider further minimizing their caffeine intake.

Stay mindful of alcohol

The CDC states that abstaining from alcohol (and marijuana!) is the safest choice for breastfeeding parents. But one standard drink per day, consumed at least two hours prior to breastfeeding, is not known to cause harm to infants. Drinking in excess of that could damage your nursing baby’s sleep patterns, development, and growth, so if you do choose to drink, practice moderation.

If you’re vegan or vegetarian, consider supplementation

Lactating parents who are vegan/vegetarian may have additional considerations to make: Vitamin B12 is often found in animal products are an important vitamin for their infant’s growth and development, and maintaining adequate B12 in the breastfeeding parents’ diet is important. Work with your IBCLC and doctor to ensure you are maintaining proper vitamin levels if you’re concerned about deficiency.

Talk to your doctor or IBCLC about multivitamins 

Lactating people need to increase their daily intake of many vitamins and minerals (like iodine), so it’s possible that your diet alone might not provide adequate nutrition — especially if you avoid certain foods. Lactating people should keep in mind that their daily intake of vitamins and minerals may require different amounts or higher levels than pregnant or non-lactating postpartum individuals. Because the recovering body needs essential vitamins and minerals to recover in addition to the body utilizing what the parent takes in for milk production, being mindful of adequate nutrition is important for the overall health and wellness of the parent. It’s always best to talk to your doctor and IBCLC to make sure you’re getting the right mix of nutrients to keep you and your baby healthy.

Increase your caloric intake

According to the CDC, lactating parents typically need an additional 450-500 kcal of nutrient-dense food every day (approximately 2,300 to 2,500 daily kcal) — that’s more calories than you needed to consume while pregnant! But that math doesn’t apply to everyone: The number of calories an individual needs will depend on their age, body mass index, activity level, and whether they’re exclusively breastfeeding or supplementing with formula. The priority is filling up your stores so you can feed your little one and recover comfortably.

A solid rule of thumb is this: Eat the things that make you feel good and schedule an insurance-covered lactation consultation with an International Board Certified Lactation Consultant about any questions that arise. When you take care of yourself with a balanced, nutritious diet, you and your baby will benefit!

Get the care you deserve

We’re here for you, every step of the way. We work with your insurance to provide in-home, in-office, or telehealth visits with an IBCLC.

A parent breastfeeding their baby in a cozy bedroom while a partner smiles at them showing support.