What Foods to Not Eat While Breastfeeding: A Helpful Guide

Posted on January 26, 2026

What Foods to Avoid While Breastfeeding: A Guide for Nourishing You & Baby

Introduction
The Truth About the Breastfeeding Diet
Foods to Avoid or Limit for Safety
Herbs That May Impact Your Milk Supply
Navigating Potential Baby Sensitivities
How to Identify a Food Sensitivity
Supporting Your Well-Being and Supply
Practical Steps for a Healthy Breastfeeding Diet
Conclusion
FAQ

Introduction

If you have recently welcomed a new baby into your family, you likely have a lot on your plate. Between late-night feedings and learning your baby's unique cues, it is natural to wonder if your own diet is affecting your little one. We often hear from parents who are worried that a morning cup of coffee or a spicy dinner might cause fussiness or digestive issues.

At Milky Mama, we believe that breastfeeding should feel empowering and manageable rather than restrictive. While your body is incredible at filtering what goes into your milk, there are a few specific things to keep in mind. This post will cover the foods and drinks you may want to limit, how to spot potential sensitivities, and why a varied diet is usually the best approach for both you and your baby.

Understanding what to eat—and what to avoid—can help you feel more confident in your nursing journey. Every body is different, but having the right information allows you to make the best choices for your specific situation. Our goal is to provide you with clinical expertise in a way that feels like a conversation with a supportive friend.

The Truth About the Breastfeeding Diet

Many new parents believe they must stick to a very bland or "perfect" diet to produce high-quality milk. The reality is much more reassuring. Your body is designed to prioritize your baby's nutrition. Even if your diet isn’t ideal every single day, your milk will still contain the essential proteins, fats, and antibodies your baby needs to thrive.

Breastfeeding is a "supply and demand" process. This means that the more milk is removed from the breast through nursing or pumping, the more milk your body will make. While what you eat can impact the flavor of your milk or the levels of certain vitamins, it rarely dictates the total volume of milk you produce.

However, your wellness matters too. Eating a variety of whole foods helps maintain your energy levels and supports your postpartum recovery. Instead of focusing on a long list of "forbidden" foods, it is often more helpful to focus on balance. Most parents can eat almost anything in moderation without it negatively affecting their baby. For more ideas, read this guide to a nourishing breastfeeding diet.

Foods to Avoid or Limit for Safety

While most foods are perfectly fine, there are a few categories where caution is necessary. These involve substances that can pass through breast milk and potentially affect a baby's developing system.

High-Mercury Fish

Fish is an excellent source of protein and omega-3 fatty acids, which support your baby's brain development. However, certain types of fish contain high levels of mercury. Mercury is a heavy metal that can be toxic, particularly to the nervous system of a developing infant.

You should generally avoid or strictly limit:

Swordfish
Shark
King Mackerel
Tilefish from the Gulf of Mexico
Bigeye Tuna

Instead, look for "best choice" options like salmon, trout, sardines, and Atlantic mackerel. These provide the benefits of fish with much lower mercury risks. A general rule of thumb is to enjoy two to three servings of low-mercury fish per week.

Excessive Caffeine

Many parents rely on caffeine to get through the exhaustion of the newborn stage. The good news is that you do not have to give up your morning coffee. Most experts, including the CDC, suggest that limiting caffeine to about 300 milligrams per day is safe. This is roughly the amount found in two to three small cups of brewed coffee.

A small amount of caffeine does pass into breast milk. While many babies are unaffected, some may be more sensitive. If you notice your baby is unusually fussy, jittery, or having trouble sleeping after you consume caffeine, you might consider reducing your intake. Remember that caffeine is also found in tea, soda, energy drinks, and chocolate.

Alcohol

The safest option for a breastfeeding baby is for the parent to avoid alcohol. However, many lactation professionals agree that an occasional drink is unlikely to be harmful if managed correctly.

Alcohol levels in your breast milk are generally the same as the levels in your bloodstream. 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, it is often best to do so right after a feeding or during a long sleep stretch. "Pumping and dumping" does not remove alcohol from your milk faster; only time can do that. If you feel "sober enough to drive," you are generally considered safe to nurse.

Artificial Sweeteners

There is limited research on how all artificial sweeteners affect breastfed infants. Some sweeteners, like saccharin, have been shown to pass into breast milk more readily than others. While most are considered safe in moderation, many parents prefer to stick to natural sweeteners like honey or maple syrup when possible to be cautious.

Key Takeaway: You don't need a restrictive diet, but being mindful of mercury, caffeine, and alcohol helps keep your breast milk as safe as possible for your baby.

Herbs That May Impact Your Milk Supply

When we talk about what not to eat, we also have to consider herbs and seasonings. Certain plants are known as "anti-galactagogues." This means they may actually decrease milk production if consumed in large quantities.

A galactagogue is a substance that helps increase milk supply. An anti-galactagogue does the opposite. You likely don’t need to worry about a sprinkle of dried herbs on your dinner, but you may want to avoid concentrated doses of the following:

Sage: This herb is often used by parents who are looking to dry up their milk supply during weaning. Avoid sage tea or large amounts of sage in cooking if you are trying to maintain or increase your supply.
Peppermint: Large amounts of peppermint, especially in the form of peppermint oil or strong peppermint tea, can lead to a dip in supply for some people.
Parsley: Similar to sage, eating massive amounts of parsley, like in a large tabbouleh salad, may have a drying effect on milk.

If you are concerned about your supply, we recommend focusing on supportive ingredients instead. For example, our Lady Leche™ lactation supplement is designed with herbs that support healthy lactation without the use of controversial ingredients.

Navigating Potential Baby Sensitivities

Sometimes, it isn't that a food is "bad," but rather that your baby has a specific sensitivity to it. This is different from a true food allergy, though both can cause discomfort. Our guide to foods to be mindful of while breastfeeding offers additional information about common concerns.

Cow's Milk Protein

The most common sensitivity in breastfed babies is cow's milk protein. If you consume dairy, the proteins can pass into your milk. For babies with a sensitivity, this can cause symptoms like:

Excessive gassiness or bloating
Frequent spitting up or reflux
Skin rashes or eczema
Mucus or streaks of blood in their stool

If you suspect a dairy sensitivity, your healthcare provider may suggest a "trial elimination." This involves removing all dairy from your diet for two to three weeks to see if your baby’s symptoms improve.

Soy and Eggs

After dairy, soy and eggs are the next most common culprits for infant sensitivities. Because soy protein is structured similarly to dairy protein, some babies who react to milk will also react to soy. If your baby is still fussy after you cut out dairy, soy might be the next thing to look at with your doctor's guidance.

The Myth of "Gassy" Vegetables

You may have heard that you should avoid "gassy" vegetables like broccoli, cabbage, cauliflower, and beans. The logic is that if they make you gassy, they will make your baby gassy.

In reality, gas is created by the breakdown of fiber in your digestive tract. Fiber does not pass into your breast milk. While some babies might be sensitive to the proteins in these vegetables, most can handle them just fine. Unless you notice a direct pattern of fussiness after eating them, there is no reason to skip these nutrient-dense greens.

Strong Flavors: Garlic and Spice

Garlic and strong spices like chili can change the flavor of your breast milk. This is actually a good thing! Exposing your baby to different flavors through your milk can make them more open to a variety of solid foods later on.

Some babies may be startled by a new or strong taste and might pull away from the breast initially. However, most babies enjoy the variety. If your baby seems genuinely distressed or has a diaper rash after you eat very spicy food, you can scale back, but for most families, spicy food is back on the menu.

How to Identify a Food Sensitivity

If your baby is consistently fussy, it can be tempting to start cutting everything out of your diet. However, over-restricting your food can lead to exhaustion and nutritional deficiencies. Instead, try a systematic approach.

Keep a Food Diary: Track what you eat and your baby's behavior for about a week. Look for patterns. Does the fussiness always happen four hours after you eat a specific food?
Look for Physical Signs: Fussiness alone isn't always about food. It could be gas, overstimulation, or a growth spurt. Physical signs like a persistent rash or unusual stools are more reliable indicators of a sensitivity.
Eliminate One Group at a Time: If you suspect an issue, pick one food group, like dairy, and remove it entirely for two weeks. If there is no change, bring it back and try the next one.
Consult a Professional: Always talk to your pediatrician or an IBCLC before making major changes to your diet.

For personalized guidance about supply, pumping, latch, or breastfeeding difficulties, consider Milky Mama’s breastfeeding help and lactation consultations.

What to do next:

Start a simple log of your meals and baby’s fussiness levels.
Focus on staying hydrated with water or drinks like our Pumpin Punch™ drink mix.
Observe if symptoms improve after avoiding a specific food for 48–72 hours.
Prioritize rest; sometimes a "fussy baby" is just an overtired baby!

Supporting Your Well-Being and Supply

Instead of focusing only on what to avoid, it is helpful to think about what to include. Breastfeeding burns a significant amount of energy—roughly 500 extra calories per day. If you are not eating enough, you may feel fatigued, which can make the challenges of early parenting feel much heavier.

Hydration and the Let-Down Reflex

Staying hydrated is essential for your overall health. While drinking massive amounts of water won't "force" your body to make more milk, being dehydrated can certainly make you feel poorly. When you nurse or pump, your body releases oxytocin, which triggers the let-down reflex, the process of milk moving forward through the ducts. This hormone can also make you feel very thirsty.

Keep a bottle of water or a lactation-supportive drink nearby. Our Milky Melon™ drink mix or Lactation LeMOOnade™ are great options for staying hydrated while enjoying a refreshing treat.

Nutrient-Dense Snacks

When you are busy with a newborn, sitting down for a full meal can be difficult. Having easy, nutrient-dense snacks on hand is a lifesaver. Look for foods that provide sustained energy:

Oatmeal, a classic supportive food for many parents
Almonds and walnuts
Hard-boiled eggs
Greek yogurt

For those days when you need a little extra support and a delicious treat, our Emergency Brownies are a favorite among our community. They are packed with ingredients like oats and flaxseed that many find helpful for maintaining a healthy supply.

Practical Steps for a Healthy Breastfeeding Diet

Feeding your baby is a marathon, not a sprint. You deserve to be nourished and satisfied. Here is a quick summary of how to approach your diet during this season:

Eat for energy: Don't skip meals. Your body needs calories to recover from birth and produce milk.
Listen to your baby: Use their behavior and physical health as your guide rather than following a generic list of "bad" foods.
Keep it simple: You don't need fancy recipes. A piece of fruit, some nuts, and a glass of water are a perfect breastfeeding snack.
Don't fear flavor: Enjoy your favorite foods. Your baby will likely enjoy the variety as much as you do.
Watch the supply-killers: Be mindful of peppermint, sage, and parsley if you notice your output decreasing.

"Breastfeeding is natural, but it doesn't always come naturally. What you eat should support your journey, not make it harder."

Conclusion

Navigating the world of breastfeeding nutrition can feel overwhelming, but the most important thing to remember is that you are doing an amazing job. Most foods are safe, and your body is incredibly efficient at creating the perfect milk for your baby. By limiting high-mercury fish, keeping an eye on caffeine, and being mindful of how your baby reacts to dairy or certain herbs, you can enjoy a wide and satisfying diet.

Focus on how you feel and how your baby is growing. If you ever feel unsure, seeking support from a professional is a great next step. Whether you need a virtual lactation consultation or just a supportive community, we are here to help you every step of the way.

Your Quick Action Plan:

Swap high-mercury fish for salmon or sardines.
Limit coffee to 2–3 cups daily.
Keep a food diary if your baby seems unusually fussy.
Treat yourself to a nourishing snack that makes you feel good.

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

FAQ

Can I eat spicy food while breastfeeding?

Yes, most babies tolerate spicy food very well. The flavors may subtly change your milk, which can help your baby get used to different tastes, but it rarely causes digestive issues unless your baby has a specific sensitivity.

Will eating broccoli or cabbage make my baby gassy?

It is unlikely that "gassy" vegetables will affect your baby. The gas you experience comes from fiber breaking down in your gut, and fiber does not pass into breast milk.

How much caffeine is safe to drink?

Most experts suggest staying under 300mg of caffeine per day, which is about two to three cups of coffee. If you notice your baby is jittery or struggling to sleep, you may want to try reducing this amount.

Do I need to stop eating dairy if my baby is fussy?

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What Foods to Not Eat While Breastfeeding: A Helpful Guide

Table of Contents

Introduction

The Truth About the Breastfeeding Diet