What Foods Should Be Avoided by Breastfeeding Mothers?

Posted on January 26, 2026

Foods to Avoid While Breastfeeding: What You Need to Know

Introduction
The Truth About the Breastfeeding Diet
Foods and Drinks to Limit or Monitor
Herbs and Ingredients That May Impact Milk Supply
Navigating Food Sensitivities and Allergies
Environmental and Health Considerations
Practical Tips for a Happy Nursing Diet
When to Seek Professional Help
Summary of Foods to Avoid or Limit
Conclusion
FAQ

Introduction

As a new parent, the list of things to worry about can feel endless. You might find yourself second-guessing every bite of food, wondering if that extra clove of garlic or your morning latte will affect your little one. It is a common misconception that breastfeeding requires a perfectly "clean" or highly restrictive diet. At Milky Mama, we believe that breastfeeding support should feel compassionate and empowering, not like a list of chores or things you aren't allowed to have. If you need personalized guidance, our breastfeeding help page is a great place to start.

We know you want the best for your baby, but you also deserve to enjoy your meals and feel nourished. While your body is incredible at filtering and producing nutrient-dense milk regardless of your exact diet, there are a few specific items that may impact your supply or your baby's comfort. This post covers the reality of "forbidden" foods, how to spot sensitivities, and how to maintain a healthy supply without the stress. Understanding what to limit helps you navigate this journey with confidence, ensuring that every drop counts while keeping your well-being a priority.

The Truth About the Breastfeeding Diet

One of the first things many mothers hear is that they need to eat a very bland diet to keep their baby happy. You might have been told to avoid spicy foods, onions, or "gassy" vegetables like broccoli. However, for the vast majority of families, these restrictions are unnecessary. Your breast milk is made from what is in your bloodstream, not directly from what is in your stomach.

Your milk-producing cells, called lactocytes, take nutrients from your blood to create the perfect milk for your baby. This process is part of what we call lactogenesis, or the beginning of milk production. Because the milk is made from your blood, the "gas" from a bowl of beans doesn't pass through to your baby, even if it makes you feel a bit bloated.

Instead of focusing on what you can't eat, it’s often more helpful to think about how your diet supports your own energy. You're doing an amazing job, and your body needs roughly 500 extra calories a day to keep up with the demands of nursing. When you eat a variety of foods, you actually expose your baby to different flavors through your milk, which can make them more open to different foods when they start solids later on.

Foods and Drinks to Limit or Monitor

While most foods are perfectly safe, there are certain substances that pass into the milk in higher concentrations or stay in your system longer. Monitoring these can help ensure your baby stays comfortable and sleeps well.

Caffeine and Baby’s Sleep

Caffeine is one of the most common concerns for nursing moms. Most of us need that morning cup of coffee to get through the day, and the good news is that you don't have to give it up. However, a small amount of caffeine does pass into your breast milk.

Newborns, especially those under six months, can be very sensitive to caffeine because their bodies don't clear it as quickly as an adult's. If you notice your baby is extra fussy, jittery, or having a hard time settling down for naps, it may be worth looking at your caffeine intake. Most experts suggest limiting caffeine to about 200 to 300 milligrams per day, which is roughly two small cups of coffee.

Keep in mind that caffeine isn't just in coffee. It's also found in:

Black and green teas
Many sodas and energy drinks
Dark and milk chocolate
Some over-the-counter headache medications

Alcohol Consumption and Timing

The rule for alcohol while breastfeeding has shifted over the years. We now know that alcohol levels in your milk are generally the same as the levels in your bloodstream. If you are sober enough to drive, you are generally considered safe to nurse. However, because a baby's liver is immature, it is best to be cautious.

If you choose to have an occasional drink, timing is everything. It typically takes about two to three hours for one standard drink to clear your system. You do not need to "pump and dump" (expressing and throwing away milk) unless you are physically uncomfortable and need to express milk before the alcohol has cleared your blood. Pumping and dumping does not speed up the removal of alcohol from your milk.

High-Mercury Fish

Fish is an excellent source of protein and omega-3 fatty acids, which are great for your baby's brain development. However, certain types of fish contain high levels of mercury, a heavy metal that can be harmful to a baby’s developing nervous system.

You should avoid or strictly limit fish that are high on the food chain, as they accumulate the most mercury. These include:

Shark
Swordfish
King mackerel
Marlin
Tilefish
Orange roughy

Instead, opt for low-mercury options like salmon, tilapia, shrimp, or cod. You can safely enjoy these two to three times a week.

Key Takeaway: Moderation is your best friend. You don't need to be perfect, but being mindful of caffeine, alcohol, and mercury levels helps keep your milk as safe and supportive as possible.

Herbs and Ingredients That May Impact Milk Supply

Many mothers are surprised to learn that certain common kitchen herbs can actually act as anti-galactagogues. An anti-galactagogue is simply a substance that may decrease your milk supply. While eating a little bit of these in a meal is usually fine, consuming them in large amounts or as concentrated oils and teas could cause a noticeable dip.

Peppermint and Spearmint

Peppermint is well-known in the lactation community for its ability to reduce milk volume. This is why some mothers use peppermint tea or peppermint candies when they are trying to wean. If you are struggling with low supply, it’s a good idea to avoid strong peppermint teas, excessive peppermint gum, or peppermint essential oils.

Sage and Parsley

Sage is another herb that can dry up milk supply. It was traditionally used by midwives to help mothers who were over-producing or looking to stop breastfeeding. Parsley has a similar effect, though you would typically need to eat quite a large amount (like a big parsley salad) to see a significant impact.

If you find that your supply is lower than you’d like, we offer several herbal lactation supplements in our lactation supplements collection that are specifically formulated with ingredients known to support a healthy milk supply. Our products are rooted in clinical lactation expertise and are designed to give you that extra boost when you need it most.

Excessive Vitamins

While taking a postnatal vitamin is usually recommended, very high doses of certain vitamins can interfere with lactation. For example, excessive amounts of Vitamin B6 or Vitamin C are sometimes linked to a decrease in the let-down reflex. The let-down reflex is the physiological response that causes milk to flow from the breast. Stick to the dosages recommended by your healthcare provider.

Navigating Food Sensitivities and Allergies

Sometimes, it isn’t about the food being "bad," but about your baby's specific reaction to it. If a baby has a sensitivity or an allergy, proteins from the food you eat can pass into your milk and cause a reaction in their digestive tract.

Cow's Milk Protein Allergy (CMPA)

The most common sensitivity in breastfed babies is to cow's milk protein. This is different from lactose intolerance. In CMPA, the baby's immune system reacts to the proteins found in the dairy you consume.

Signs your baby might have a dairy sensitivity include:

Extreme fussiness or colic-like symptoms
Skin rashes or eczema
Green, mucusy, or bloody stools
Frequent spitting up or vomiting
Wheezing or congestion

If you suspect a dairy allergy, it is important to talk to a lactation consultant or your pediatrician before cutting out entire food groups. They can help you determine if an elimination diet is necessary. Our 7 signs your milk supply is actually low guide can also help you sort out whether the issue is supply or something else.

Other Common Allergens

While dairy is the most frequent culprit, other foods can also trigger sensitivities. These include soy, eggs, gluten, and nuts. However, there is no evidence that avoiding these foods during pregnancy or breastfeeding prevents allergies. In fact, early exposure through breast milk might actually help protect your baby from developing allergies later on.

The Myth of Spicy Foods

Many cultures believe spicy foods cause gas or fussiness. While spices like garlic or chili can change the scent and flavor of your milk, most babies actually enjoy the variety! Unless you notice a clear pattern where your baby is uncomfortable every time you eat something spicy, there is no reason to stick to bland meals.

Action Steps for Identifying Sensitivities:

Keep a simple food and symptom diary for 3–5 days.

Look for patterns between what you eat and your baby's behavior.

Consult a certified lactation professional before starting a strict elimination diet.

Focus on one change at a time so you know exactly what is helping.

Environmental and Health Considerations

When we talk about what to avoid, we also have to consider things that aren't exactly "food" but are often consumed.

Supplements and Medications

Not all supplements are created equal. Many over-the-counter herbal remedies haven't been studied for safety during lactation. Always check with your doctor or an IBCLC before starting a new herbal regimen.

It is also important to be cautious with certain medications. Antihistamines, for example, are designed to dry up secretions in your nose and eyes, but they can also dry up your milk supply. If you have bad allergies, talk to your provider about breastfeeding-friendly options that won't impact your volume.

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

Processed Foods and Artificial Sweeteners

While an occasional treat is perfectly fine, a diet very high in processed sugars and artificial sweeteners can sometimes make you feel more fatigued. Since breastfeeding already takes a lot of energy, focusing on whole foods can help you feel your best. Our Emergency Lactation Brownies are a great example of a functional treat—they satisfy your sweet tooth while using ingredients like oats and flaxseed to support your lactation goals.

Practical Tips for a Happy Nursing Diet

Instead of feeling restricted, try to focus on what you can add to your day to make breastfeeding easier and more enjoyable.

Prioritize Hydration

Hydration is essential for your own health and energy levels. While drinking gallons of water won't "force" your body to make more milk, being dehydrated can certainly make you feel depleted. We love our Pumpin Punch™ mocktail and lactation drink mixes because they provide hydration along with lactation-supporting ingredients, making it easier to hit your daily fluid goals.

Focus on Nutrient Density

Rather than counting every calorie, focus on "nutrient density"—foods that pack a lot of vitamins and minerals into every bite.

Healthy Fats: Avocado, nuts, and olive oil help keep you full.
Protein: Lean meats, beans, and eggs support tissue repair.
Complex Carbs: Oatmeal and brown rice provide steady energy.

Listen to Your Body

Your body is very good at telling you what it needs. If you're starving, eat! If you're thirsty, drink. Breastfeeding is a marathon, not a sprint, and you need to fuel yourself accordingly. You are doing an amazing job, and your well-being matters just as much as the baby's.

When to Seek Professional Help

If you have tried adjusting your diet and your baby is still extremely fussy, or if you are worried your supply is dropping, don't struggle in silence.

Sometimes, what looks like a food sensitivity is actually a fast let-down or a latch issue. A virtual lactation consultation can help you figure out exactly what is going on. Our team at Milky Mama is here to offer expert guidance and emotional validation. Remember, breastfeeding is natural, but it doesn't always come naturally. Having a professional in your corner can make all the difference.

Summary of Foods to Avoid or Limit

To make things simple, here is a quick reference for your breastfeeding journey:

Limit Caffeine: Keep it under 300mg a day to help baby sleep better.
Watch High-Mercury Fish: Avoid shark, swordfish, and king mackerel.
Monitor "Supply Killers": Be careful with large amounts of sage, peppermint, and parsley.
Time Alcohol Carefully: Wait 2–3 hours after a drink before nursing if possible.
Observe for Allergies: Only cut out dairy or other allergens if your baby shows clear symptoms of a sensitivity.
Check Your Meds: Avoid strong antihistamines that might dry up your supply.

"Your breastfeeding journey is unique. While it's wise to be mindful of a few specific ingredients, most of the 'rules' you hear are myths. Focus on nourishing yourself, staying hydrated, and enjoying this time with your baby."

Conclusion

Navigating what to eat while breastfeeding doesn't have to be a source of stress. Most of the time, you can continue enjoying the foods you love while your body does the incredible work of nourishing your baby. By keeping an eye on caffeine, choosing low-mercury fish, and being mindful of supply-impacting herbs, you can support a healthy lactation experience. If you want to keep learning, our foods that lower breast milk supply guide is a helpful next read.

Most foods are safe in moderation.
Focus on how you feel and how your baby reacts.
Supplements and hydration can provide extra support.
Consult a professional if you suspect a true allergy.

You deserve to feel supported and empowered every step of the way. If you’re looking for a simple way to support your supply while enjoying a delicious snack, try our Emergency Lactation Brownies or explore our lactation supplements collection for another easy option. You’ve got this, and we are here to help.

FAQ

Can I eat spicy food while breastfeeding?

Yes, most babies tolerate spicy foods just fine. The flavors of your diet can pass into your milk, which may actually help your baby accept a wider variety of foods later in life. Only avoid spicy foods if you notice a consistent pattern of fussiness or digestive upset in your baby after you eat them.

Is it safe to drink coffee while nursing?

It is generally safe to consume moderate amounts of caffeine, usually about 200–300mg per day. Some babies are more sensitive than others, so if your little one seems unusually restless or has trouble sleeping, you might try reducing your intake. Remember that caffeine can be found in tea, soda, and chocolate as well.

Will peppermint tea dry up my milk supply?

Peppermint is an anti-galactagogue, meaning it has the potential to reduce milk production in some women. While a single cup of tea occasionally may not cause a major change, drinking it frequently or using strong peppermint oils could lead to a dip in supply. If you are struggling with low milk volume, it is best to avoid peppermint.

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

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