What Foods Do I Need to Avoid While Breastfeeding?

Posted on January 26, 2026

Foods to Avoid While Breastfeeding: Nurturing Your Baby and Yourself

Introduction
The Reality of the Breastfeeding Diet
Foods to Limit or Avoid for Baby’s Safety
Herbs and Supplements That Can Impact Supply
Navigating Baby’s Sensitivities and Allergies
Prioritizing Your Nutrition and Wellness
Simple Swaps and Support
Conclusion
FAQ

Introduction

One of the first questions many new parents ask after bringing their little one home is, "What can I eat?" After nine months of avoiding sushi, deli meats, and soft cheeses, you might be looking forward to a bit more freedom at the dinner table. However, the worry often shifts from what affects the pregnancy to what might pass through your milk. It is completely normal to feel a little anxious about how your diet impacts your baby’s comfort and your milk supply.

At Milky Mama, we believe that breastfeeding should be an empowering experience, not one defined by a long list of "no" foods. Most of the time, you can enjoy a wide variety of delicious, nourishing meals while nursing. In fact, eating a diverse diet is actually beneficial for your baby’s developing palate.

If you ever want a more structured starting point, our Breastfeeding 101 course is built to help parents feel more confident early on.

In this post, we will break down the few foods you might want to limit, which herbs could potentially impact your supply, and how to spot if your baby has a genuine sensitivity. Our goal is to help you feel confident in your choices so you can focus on bonding with your baby. You’re doing an amazing job, and we are here to support you every step of the way.

The Reality of the Breastfeeding Diet

The first thing to understand is that your body is incredibly efficient at making milk. Breasts were literally created to feed human babies, and they do a remarkable job of filtering what you consume to create the perfect nutrition for your little one. For most parents, a "breastfeeding diet" is simply a balanced, healthy diet that includes enough calories to keep your energy up.

You don't need a "perfect" diet to produce high-quality milk. Even if your nutrition isn't ideal on a given day, your body will prioritize the baby’s needs. However, what you eat does matter for your well-being. Keeping yourself nourished and hydrated helps you stay alert and resilient during those long nights.

For a deeper look at supply and support, our guide on what increases breast milk supply can be a helpful next step.

While there are very few foods that are strictly "off-limits," there are certain categories of food and drink that require a bit of mindfulness. These usually fall into three groups: things that could be safety concerns (like mercury), things that might lower your milk supply, and things that might cause a reaction in your specific baby.

Key Takeaway: Most foods are safe during breastfeeding. A varied diet helps your baby get used to different flavors, which may even make the transition to solid foods easier later on.

Foods to Limit or Avoid for Baby’s Safety

When we talk about avoiding certain foods, safety is the top priority. While your milk acts as a filter, some substances can still pass through in amounts that might affect a developing infant.

High-Mercury Fish

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

You should consider avoiding or strictly limiting the following fish:

Shark
Swordfish
King mackerel
Marlin
Tilefish from the Gulf of Mexico
Bigeye tuna

Instead, look for low-mercury options like salmon, pollock, shrimp, and sardines. It is generally recommended to limit fish intake to about two to three servings per week. If you enjoy tuna, choose "light canned" over "albacore" to keep mercury levels lower.

Caffeine Consumption

Most parents need a little caffeine to get through the day, and the good news is that you don't have to give up your morning cup of coffee. However, a small amount of caffeine does pass into breast milk. While adults process caffeine quickly, newborns take much longer to clear it from their systems.

If caffeine is part of your routine, it can help to keep an eye on your baby’s sleep and fussiness patterns before making any big changes.

Alcohol and Breastfeeding

There is a lot of conflicting information about alcohol and nursing. The current clinical consensus is that an occasional drink is generally considered safe, but timing is important. Alcohol levels in your milk match the alcohol levels in your blood.

If you choose to have a drink, it is often suggested to wait about two hours per drink before breastfeeding. This gives your body time to metabolize the alcohol so it is no longer in your milk supply. "Pumping and dumping" doesn't actually remove alcohol from the milk faster; only time can do that. If you are feeling the effects of alcohol, it is best to wait to nurse or use previously expressed milk.

Herbs and Supplements That Can Impact Supply

Many people don't realize that some common kitchen herbs are actually galactofuges—substances that may decrease milk supply. While having a little bit of these in a meal is usually fine, consuming them in medicinal amounts or very large quantities might cause a dip in production.

Peppermint, Sage, and Parsley

These three herbs are the most common culprits for a surprise drop in milk supply.

Peppermint: This includes peppermint tea, strong peppermint candies, or essential oils. While a single peppermint patty won't dry you up, drinking several cups of peppermint tea a day might.
Sage: This herb is often used by parents who are looking to wean because of its effectiveness at reducing supply. Be mindful of dishes like Thanksgiving stuffing or sage-heavy sausages.
Parsley: Specifically in large amounts, such as in a tabbouleh salad, parsley can have a drying effect for some people.

High Doses of Certain Vitamins

While a postnatal vitamin is usually recommended, avoid taking mega-doses of certain vitamins unless directed by your healthcare provider. For example, very high doses of Vitamin B6 or Vitamin C are sometimes thought to act as mild antihistamines, which can occasionally impact milk flow for some parents.

If you are looking for ways to support your supply without these risks, we recommend looking into herbal blends specifically designed for lactation. Our Pump Hero™ or Pumping Queen™ supplements are formulated with ingredients that support milk production without the use of herbs that might cause unwanted side effects for sensitive babies.

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

Navigating Baby’s Sensitivities and Allergies

Sometimes, the food you eat doesn't affect your milk supply, but it does affect your baby’s tummy. It is important to distinguish between a "gassy" baby and a baby with a genuine food allergy or intolerance.

The Truth About Gassy Foods

You may have heard that you should avoid "gassy" foods like broccoli, cabbage, beans, and cauliflower. The theory is that if it makes you gassy, it will make the baby gassy. However, gas is produced by the breakdown of fiber in your gut. Fiber does not pass into breast milk.

Most babies are naturally gassy because their digestive systems are immature. They are learning how to process milk and move bubbles through their intestines. Unless you notice a clear pattern where your baby is in significant pain every time you eat a specific vegetable, there is no need to cut these nutritious foods out of your diet.

Cow’s Milk Protein Allergy (CMPA)

The most common true sensitivity in breastfed babies is to cow's milk protein. This is different from lactose intolerance. When you consume dairy, the proteins can pass into your milk. For some babies, this causes an inflammatory response in their gut.

Symptoms of a potential dairy sensitivity include:

Excessive fussiness or "colic" symptoms
Skin rashes or eczema
Persistent congestion or wheezing
Green, mucousy, or bloody stools
Frequent, forceful spitting up

If you suspect a dairy allergy, it is important to talk to your pediatrician or a certified lactation consultant before starting an elimination diet. For one-on-one help, our Breastfeeding Help page is a good place to start.

Flavors That Travel: Garlic and Spice

Strong flavors like garlic, onions, and spicy peppers do change the flavor of your milk. Interestingly, research shows that babies often like these variations! Exposing your baby to garlic or spices through your milk can actually make them more adventurous eaters later in life.

However, every baby is an individual. If your baby seems to pull away or refuse the breast after you’ve had a particularly spicy meal, they might just be sensitive to that specific flavor profile.

What to do next:

Keep a simple food diary if you notice recurring fussiness.

Look for patterns over 2-3 days, not just a single meal.

Introduce new "risky" foods one at a time.

Consult a lactation professional if you feel the need to restrict more than two food groups.

Prioritizing Your Nutrition and Wellness

Instead of focusing on what to avoid, we love to focus on what to include. Breastfeeding burns a significant amount of energy—roughly 500 extra calories a day. You deserve to be well-fed!

Focus on Whole Grains and Healthy Fats

Foods like oatmeal and brown rice are fantastic for breastfeeding parents. Oatmeal is a well-known supportive food for lactation because it is rich in iron and fiber. Healthy fats, such as those found in avocados, nuts, and seeds, help keep you satisfied and provide essential nutrients for your baby’s growth.

Our Emergency Lactation Brownies are a fan-favorite for a reason; they are packed with oats, brewer's yeast, and flaxseed. These ingredients are traditional galactagogues—foods that may support milk supply—wrapped in a delicious treat that feels like a reward for all your hard work.

Stay Hydrated

Hydration is perhaps the most important part of your diet. While drinking extra water won't "force" your body to make more milk than it needs, being dehydrated can certainly make you feel sluggish and may eventually impact your output.

A good rule of thumb is to drink to thirst. Many parents find it helpful to drink a glass of water every time they sit down to nurse or pump. If you get bored with plain water, our Pumpin Punch™ drink mix is an excellent option for adding variety to your routine.

Simple Swaps and Support

If you find that you do need to avoid certain foods, don't feel discouraged. There is almost always a supportive alternative.

Instead of Peppermint Tea: Try ginger or Rooibos tea for a soothing, supply-safe drink.
Instead of High-Mercury Fish: Focus on wild-caught salmon or sardines for those essential Omega-3s.
Instead of Sage-Heavy Meals: Use basil, oregano, or thyme to flavor your cooking without worrying about your supply.
Instead of Excessive Caffeine: Try a decaf version of your favorite coffee or a fruit-infused water to boost your energy levels naturally.

Every drop counts, and so does every bit of your mental health. If an elimination diet is making you feel stressed and overwhelmed, that stress can be harder on your breastfeeding journey than a little bit of dairy or caffeine ever would be. For more hands-on guidance, Milky Mama’s lactation consultations can help you sort through what’s going on.

Conclusion

Navigating what to eat while breastfeeding doesn't have to be a source of stress. While it’s wise to be mindful of high-mercury fish, limit your caffeine and alcohol, and keep an eye on herbs like sage and peppermint, the vast majority of foods are perfectly safe and healthy for you and your baby. Most "fussiness" is a normal part of infant development rather than a reaction to your lunch.

Prioritize variety and calories to keep your energy up.
Stay hydrated by drinking to thirst throughout the day.
Trust your body and your baby’s cues.

Breastfeeding is a journey that looks different for everyone. If you ever feel concerned about your supply or your baby's reactions, reaching out for professional support is a great next step. We invite you to join our Milky Mama community for more education, support, and lactation-friendly treats to help you thrive. If you want a deeper learning path, the Breastfeeding 101 course is a helpful place to continue. You've got this!

FAQ

Will eating spicy food give my baby diaper rash?

In most cases, spicy food does not cause diaper rash or digestive upset for babies. While the flavors do pass into the milk, the "heat" from capsaicin is usually filtered out. If you notice your baby has a red ring around their anus or seems uncomfortable after you eat spicy food, you can try scale back the heat, but it is not a common requirement for most nursing parents.

How much caffeine is actually safe while breastfeeding?

Most major health organizations, including the CDC, suggest that up to 300mg of caffeine per day is safe for breastfeeding parents. This is roughly the amount in two to three 8-ounce cups of brewed coffee. Keep in mind that some babies are more sensitive to caffeine than others, so watch for signs of irritability or poor sleep if you are a regular coffee drinker.

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

No, you usually do not need to stop eating dairy just because your baby is gassy. Gas is a normal part of newborn life as their digestive tract matures. A dairy elimination diet is typically only recommended if your baby shows signs of a true protein allergy, such as blood in the stool, severe eczema, or extreme discomfort that doesn't resolve with standard soothing techniques.

Can peppermint really dry up my milk supply?

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What Foods Do I Need to Avoid While Breastfeeding?

Table of Contents

Introduction

The Reality of the Breastfeeding Diet