Breastfeeding and Unsure What to Eat or Drink? Caffeine, Alcohol, Fish, and Constant Hunger

Mother breastfeeding her baby while sitting on a couch

Breastfeeding brings a wave of food questions: Is coffee okay? Can I have a glass of wine? Which fish? Why am I always hungry? Here is what current guidance says, in plain language.

By Full Healthy Lives How we write our guides

In the early weeks of breastfeeding, everyone seems to have an opinion about what you should eat or avoid. Most of it is not based on evidence. This guide sticks to what the CDC, the U.S. Office of Disease Prevention and Health Promotion (ODPHP), and the FDA actually recommend. If your problem is having any time or energy to cook at all, our family meal survival plan for after baby covers that.

You do not need a special diet

ODPHP recommends a healthy eating routine with a mix of foods you enjoy from each food group: proteins, dairy or fortified alternatives, vegetables, fruits, healthy fats, and whole grains, with less added sugar, saturated fat, and sodium. There is no list of foods every breastfeeding parent must avoid.

Why you feel so hungry

ODPHP says breastfeeding parents generally need 330 to 400 more calories a day than before pregnancy. Constant hunger is common, especially in the early months. Work with your clinician on a plan that fits your own needs and goals rather than restricting food early on.

Eat regular meals and keep snacks within reach during feeds

Include protein at each meal, such as eggs, yogurt, beans, fish, or meat

Add vegetables and fruit for fiber and nutrients

Choose whole grains for longer-lasting energy

Accept help with meals from family and friends

Drink to thirst

Your body needs extra fluids while breastfeeding. ODPHP suggests a glass of water or another unsweetened drink every time you breastfeed, and limiting sugary drinks such as soda and sports drinks.

Caffeine: usually fine in moderation

ODPHP says up to 300 mg of caffeine a day, about 3 cups of coffee, is usually safe while breastfeeding, though your doctor may recommend less. The CDC also notes that very young or premature babies may be more sensitive. Watch for signs such as fussiness, jitteriness, or poor sleep in your baby, and cut back if you notice them. Remember that tea, sodas, and energy drinks contain caffeine too.

Alcohol: timing matters

The CDC says not drinking alcohol is the safest option while breastfeeding. It also says moderate drinking, up to one drink a day, is not known to be harmful to the baby, especially if the parent waits at least 2 hours after a single drink before nursing. ODPHP explains that alcohol from one drink can be detected in breast milk for about 2 to 3 hours, two drinks for about 4 to 5 hours, and three drinks for about 6 to 8 hours.

If you plan to drink, have it just after breastfeeding or pumping, not before.
Expressed milk from before drinking can cover a feed if needed.
The CDC notes that “pumping and dumping” does not speed up how quickly alcohol leaves your milk; time does.
Never share a bed or sofa with your baby after drinking.

Fish: choose low-mercury options

ODPHP recommends 8 to 12 ounces of seafood a week while breastfeeding, choosing fish and shellfish low in mercury. FDA and EPA advice lists “best choices” such as salmon, sardines, shrimp, cod, and canned light tuna. The CDC advises avoiding high-mercury fish including shark, swordfish, king mackerel, and tilefish.

Supplements and special diets

ODPHP suggests asking your doctor whether you need a daily supplement, such as a multivitamin. If you follow a vegetarian or vegan diet, have food allergies, or had weight-loss surgery, ask your clinician or a registered dietitian whether you need specific supplements. Do not start herbal supplements to boost supply without talking to a clinician or lactation consultant.

Do certain foods upset the baby?

Most babies tolerate a wide variety of foods in a parent’s diet. If you notice a consistent pattern, such as fussiness, rash, or blood in the stool, after a particular food, talk with your pediatrician before cutting out whole food groups. Removing foods without guidance can make it harder to eat well.

Easy snacks for one-handed eating

Yogurt or cheese with fruit
Whole-grain crackers and hummus or nut butter
Hard-boiled eggs prepared in batches
Overnight oats or muffins made ahead
Trail mix with nuts and dried fruit

Keep a water bottle and snacks at your usual feeding spot; our postpartum recovery station guide shows how to set one up.

When to ask for help

Ask your clinician, pediatrician, or a lactation consultant if you are worried about your baby’s weight gain or feeding, have trouble eating enough, or feel very low or anxious. Postpartum mood changes deserve attention. In the U.S., the National Maternal Mental Health Hotline (1-833-852-6262) offers free, confidential support by call or text, and Postpartum Support International can connect you with local help.

Common myths

“You must drink milk to make milk.” Any fluids help with hydration; dairy is one option among many protein and calcium sources.
“Spicy or strong-flavored foods are off-limits.” ODPHP does not list foods all breastfeeding parents must avoid; watch your own baby instead of following blanket rules.
“You need to diet to lose pregnancy weight right away.” Breastfeeding raises calorie needs; work with your clinician on a gradual approach.

A sample day of easy eating

Breakfast: Oatmeal with fruit and nuts, plus a glass of milk or a fortified plant drink
Snack: Yogurt or a cheese stick with an apple
Lunch: Whole-grain wrap with canned salmon or beans and salad greens
Snack: Hummus with crackers and carrot sticks
Dinner: A simple stir-fry or sheet-pan meal with chicken or tofu, vegetables, and rice

Adjust portions to your hunger. Batch-cooking a few items when help is available makes the rest of the week easier.

If you are pumping at work or school, pack snacks and a water bottle with your pump supplies so breaks double as fuel stops.

Keep a few shelf-stable options, like nut butter, oats, and canned fish, for the days when fresh food runs out.

Bottom line

Breastfeeding does not require a special diet. Eat a varied routine, expect to need about 330 to 400 extra calories a day, drink to thirst, keep caffeine to about 300 mg a day or less, time any alcohol carefully, choose low-mercury fish, and ask your clinician about supplements and any feeding concerns.

Lactation teas, cookies, and supply supplements

Teas, cookies, and capsules marketed to boost milk supply are common gifts, but the evidence that they work is limited, and herbal products are not checked for safety and effectiveness the way medicines are. Some herbs commonly used for milk supply, such as fenugreek, can cause side effects. Before trying one:

Check the ingredient in LactMed, the NIH database on medicines and supplements during breastfeeding.
Ask a lactation consultant or your baby’s doctor to look at what is actually happening. Frequent, effective milk removal is usually the main driver of supply, and a latch or pumping issue may be the real cause.
Tell your clinician about any supplement you take, especially if you take other medicines or have a health condition.

Worry about supply is very common. Signs such as your baby’s wet and dirty diapers and weight checks are more reliable than how full you feel.

Key takeaways

A varied healthy eating routine is enough; no special diet is required.
Breastfeeding parents generally need 330 to 400 extra calories a day.
Up to about 300 mg of caffeine a day is usually safe; watch your baby for fussiness.
Not drinking is safest; if you drink, wait at least 2 hours per drink before nursing.
Eat 8 to 12 ounces of low-mercury seafood a week and avoid high-mercury fish.