What Foods to Stay Away From When Breastfeeding

Posted on January 26, 2026

What Foods to Avoid While Breastfeeding for a Smoother Journey

Introduction
The Truth About Your Breastfeeding Diet
High-Mercury Fish and Seafood Safety
Navigating Caffeine While Nursing
Understanding Alcohol and Breast Milk
Herbs That May Impact Milk Supply
Foods That Might Affect Your Baby’s Comfort
Identifying Common Food Sensitivities
Navigating Processed Foods and Additives
Foods to Focus On Instead
Conclusion
FAQ

Introduction

Finding out what you can and cannot eat after your baby arrives often feels like learning a whole new set of rules. During pregnancy, the list of off-limits foods was likely very clear, but breastfeeding is a bit different. You are working hard to nourish your little one, and it is natural to worry if that extra cup of coffee or a spicy taco might cause issues for your baby.

At Milky Mama, we believe that breastfeeding support should feel compassionate and empowering, not like a list of chores. While your body is incredibly efficient at making the perfect milk for your baby, there are a few things that might impact your supply or your baby's comfort. This guide covers which items to limit and which ones to watch closely so you can feel confident in your feeding journey. Knowing what foods to stay away from when breastfeeding helps you focus on your own wellness while keeping your baby happy and healthy.

The Truth About Your Breastfeeding Diet

The first thing you should know is that your body is designed to prioritize your baby. Even if your diet is not "perfect," your milk will still be highly nutritious. However, what you eat can affect how you feel and, in some cases, how your baby reacts. Some substances pass into breast milk more easily than others.

Most parents can eat a wide variety of foods without any issues at all. You do not need to follow a bland diet or avoid your favorite flavors unless you notice a specific reaction in your baby. Instead of focusing on restriction, we want to help you understand how certain choices might influence your lactation experience.

High-Mercury Fish and Seafood Safety

Fish is an excellent source of protein and omega-3 fatty acids, which are vital for your baby's brain development. However, mercury is a heavy metal that can be toxic, especially to the developing nervous systems of infants. Mercury can pass through your breast milk, so it is important to choose your seafood wisely.

You should stay away from fish that are known to have high mercury levels. These are usually large, predatory fish that live for a long time.

Common high-mercury fish to avoid include:

Shark
Swordfish
King Mackerel
Tilefish from the Gulf of Mexico
Orange Roughy
Marlin

Instead, look for low-mercury options like salmon, tilapia, cod, and shrimp. These provide the benefits of healthy fats without the high risk of heavy metal exposure. Most experts suggest limiting even low-mercury fish to about two to three servings per week.

Navigating Caffeine While Nursing

Many new parents rely on caffeine to get through those long nights and early mornings. The good news is that you do not have to give up your morning latte entirely. However, caffeine does pass into breast milk.

While adults process caffeine quickly, newborns have a much harder time breaking it down. If you consume large amounts, the caffeine can build up in your baby's system. This might lead to a baby who is extra fussy, irritable, or has trouble sleeping.

Most lactation professionals recommend staying under 300 milligrams of caffeine per day. This is roughly the amount in two small cups of coffee. Keep in mind that caffeine is also found in:

Black and green teas
Many sodas
Energy drinks
Dark chocolate

If you notice your baby seems jittery or stays awake longer than usual after you have had caffeine, try cutting back for a few days to see if their behavior improves.

Understanding Alcohol and Breast Milk

Alcohol is another topic that comes up frequently for breastfeeding families. When you drink alcohol, it enters your bloodstream and then moves into your breast milk. The concentration of alcohol in your milk is generally the same as the concentration in your blood.

The safest option is to avoid alcohol, but having an occasional drink is generally considered okay if handled carefully. It takes about two to three hours for the alcohol from one standard drink to leave your system.

If you choose to have a drink, try to do so immediately after a feeding or pumping session. This gives your body the most time to clear the alcohol before the next time your baby needs to eat. If you have more than one drink, it is often recommended to wait longer or use previously expressed milk.

Key Takeaway: You do not need to "pump and dump" after one drink. Simply waiting for the alcohol to naturally clear your bloodstream will also clear it from your milk.

Herbs That May Impact Milk Supply

In the world of lactation, we often talk about galactagogues. A galactagogue is a substance, usually an herb or food, that may help increase milk supply. However, there are also "anti-galactagogues." These are substances that can potentially decrease the amount of milk you produce.

For most people, using these herbs as a seasoning in food is perfectly fine. The concern arises when they are consumed in medicinal amounts, such as in concentrated teas or supplements. If you are looking into lactation supplements, it can help to know which ingredients are commonly used and why.

Sage and Parsley

Sage is one of the most well-known herbs for drying up milk supply. It is sometimes used intentionally by parents who are ready to wean. If you are trying to maintain or increase your supply, you may want to avoid eating large amounts of sage, such as in heavy stuffings or concentrated sauces. Parsley has a similar reputation when consumed in very high quantities.

Peppermint and Spearmint

Peppermint can also have a drying effect on milk supply for some people. This includes peppermint tea, strong peppermint candies, or essential oils. While a single candy probably won't hurt, drinking several cups of strong peppermint tea every day might lead to a noticeable dip in your output. If you love tea, try a fruit-based or ginger tea instead.

Foods That Might Affect Your Baby’s Comfort

Sometimes, the concern isn't about supply, but about how the baby feels after a feeding. Because breast milk is made from your blood, not directly from the contents of your stomach, the connection between "gassy foods" and a "gassy baby" is not always direct. However, some babies are more sensitive than others.

Gassy Foods and Digestive Upsets

You may have heard that you should stay away from broccoli, cabbage, beans, and cauliflower. These are high-fiber vegetables that can cause gas in adults. For most babies, these do not cause any issues because the gas-causing fibers stay in your digestive tract and do not enter your milk.

However, some parents do notice a pattern. If your baby seems consistently uncomfortable or gassy a few hours after you eat these foods, it might be worth taking a short break from them. Always observe your baby’s individual reaction rather than following a strict list of forbidden vegetables.

Strong Flavors Like Garlic

Garlic is a wonderful ingredient, but it has a very strong scent and flavor that can change the taste of your milk. Interestingly, some research suggests that babies might actually like the taste of garlic and may nurse longer when it is present.

On the other hand, some babies are sensitive to the change and might pull away from the breast or seem confused. If you notice your baby refusing to nurse after you have had a very garlicky meal, you might want to tone down the seasoning for a while.

Identifying Common Food Sensitivities

True food allergies in breastfed babies are relatively rare, but food sensitivities are more common. This happens when a protein from your diet passes into your milk and irritates the baby's digestive system.

Dairy and Soy Proteins

Cow's milk protein is the most common sensitivity for breastfed infants. When a baby is sensitive to dairy, it is not the same as being lactose intolerant. It is a reaction to the specific proteins found in the milk.

Symptoms of a dairy sensitivity can include:

Excessive fussiness or "colic" behavior
Skin rashes or eczema
Green, mucus-like stools
Spitting up excessively or signs of reflux
Blood in the stool (this requires an immediate call to your pediatrician)

Soy protein is often the second most common sensitivity. Many babies who react to dairy also react to soy. If you suspect a sensitivity, it is best to speak with a lactation consultant or your healthcare provider before cutting out entire food groups.

Other Potential Allergens

While dairy and soy are the main culprits, some babies may react to eggs, corn, or nuts. If your family has a strong history of allergies, you might be more alert to these signs. However, current research suggests that exposing your baby to these foods through your milk might actually help prevent allergies later in life. Unless your baby shows symptoms of a reaction, there is usually no reason to avoid these healthy foods.

Navigating Processed Foods and Additives

When you are exhausted, it is easy to reach for highly processed snacks and convenience foods. While these are fine in moderation, some additives may affect how you or your baby feels.

Some parents find that artificial sweeteners, such as aspartame or sucralose, can affect their baby's digestion. Others find that high amounts of food dyes can lead to changes in a baby's behavior or sleep patterns. While the evidence is largely anecdotal, focusing on whole, recognizable foods is always a good strategy for overall wellness.

Our Milky Mama products, like our Emergency Lactation Brownies, are designed with high-quality ingredients to support your journey. We prioritize ingredients that are generally well-tolerated and supportive of lactation goals.

Foods to Focus On Instead

Instead of worrying about what to take away, it can be more helpful to think about what to add. A diet rich in nutrients will help you recover from childbirth and keep your energy levels steady.

Whole Grains: Oats are a classic favorite for breastfeeding parents. They are high in iron and fiber.
Healthy Fats: Avocado, olive oil, and nuts provide the energy your body needs to produce milk.
Hydration: Staying hydrated is one of the most important things you can do. Our Lactation LeMOOnade™ or other lactation drink mixes are great ways to stay hydrated while enjoying a treat that supports your supply.
Protein: Lean meats, eggs, beans, and lentils help with tissue repair and keep you feeling full.

Action Plan for a Happy Breastfeeding Diet:

Start by eating a varied, balanced diet without restrictions.
Keep a simple food log if you notice your baby is unusually fussy.
Limit caffeine to 2-3 cups of coffee daily.
Choose low-mercury fish like salmon or cod.
Stay hydrated with water or electrolyte-supporting lactation drinks.
Watch for signs of dairy sensitivity if your baby has skin or stool issues.

Conclusion

Breastfeeding is a journey that requires a lot of your energy and love. While there are certainly foods to stay away from when breastfeeding—like high-mercury fish and excessive caffeine—most foods are perfectly safe. The most important thing is to listen to your body and your baby.

Every breastfeeding relationship is unique. What works for one parent might not work for another, and that is okay. If you ever feel overwhelmed or worried about your supply, we are here to help. You're doing an amazing job, and your well-being matters just as much as your baby's.

Key Takeaway: Focus on nourishing yourself with whole foods, stay hydrated, and only restrict specific items if you or your baby show clear signs of a sensitivity.

If you are looking for more support, consider trying our Lady Leche™ supplements or Pump Hero™ to help support your lactation goals. We are proud to offer products and education that empower families through every stage of their breastfeeding journey.

This product is not intended to diagnose, treat, cure, or prevent any disease. Consult with your healthcare provider for medical advice.

FAQ

Does spicy food cause diaper rash or fussiness in babies?

For most babies, spicy food is perfectly fine and does not cause issues. The flavors may change the taste of your milk, but this is actually a good way to introduce your baby to different foods. If you notice a consistent pattern of diaper rash or fussiness after you eat spicy meals, you can try reducing the heat to see if it helps.

Should I stop eating broccoli and beans if my baby is gassy?

Not necessarily, as the gas-forming components of these vegetables do not usually pass into breast milk. Most baby gas is caused by their immature digestive systems or swallowing air during feedings. However, if you notice your baby is clearly more uncomfortable every time you eat a specific vegetable, it is okay to take a break from it for a week to see if things improve.

How much coffee can I safely drink while breastfeeding?

Most experts recommend limiting caffeine to about 200 to 300 milligrams per day, which is roughly two to three small cups of brewed coffee. Some babies are more sensitive to caffeine than others, especially newborns. If your baby seems unable to sleep or extra irritable, try reducing your intake and see if you notice a difference.

Can I eat peanuts and shellfish if I’m breastfeeding?

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