Does Drinking More Water Increase Milk Supply

Posted on March 09, 2026

Introduction
The Relationship Between Hydration and Milk Production
How Your Body Actually Makes Milk
How Much Should You Drink While Breastfeeding?
Real Ways to Increase Your Milk Supply
Common Obstacles to a Healthy Milk Supply
The Importance of Self-Care for the Breastfeeding Mom
When to Seek Professional Help
Summary of Hydration and Lactation
Conclusion
FAQ

Introduction

If you have ever spent a late night scrolling through breastfeeding forums, you have likely seen the advice to "just drink more water" to fix a low milk supply. It sounds so simple and logical. Since breast milk is mostly water, it feels like the more you put in, the more you should get out. However, many parents find themselves chugging gallons of water only to see the same amount of milk in the pump bottle.

At Milky Mama, we know how stressful it is to worry about your supply. We were founded by Krystal Duhaney, a Registered Nurse and International Board Certified Lactation Consultant (IBCLC), to provide real, evidence-based support for your journey. While staying hydrated is absolutely essential for your health, the relationship between your water intake and your milk production is a bit more complex than most people think.

In this post, we will explore whether drinking more water increases milk supply, how your body actually creates milk, and what you can do to support your production effectively. Our goal is to help you understand the science of lactation so you can feel empowered and confident.

The Relationship Between Hydration and Milk Production

It is a common belief that extra hydration leads to extra milk. This idea stems from the fact that breast milk is approximately 90% water. If you are producing 30 ounces of milk a day, your body is essentially "giving away" nearly a quart of its own fluid. It makes sense that you need to replace that fluid to keep your body running smoothly.

However, clinical research suggests that drinking water beyond your natural thirst does not significantly increase the amount of milk you produce. One of the most famous reviews on this topic analyzed several studies and found that forced fluid intake—drinking when you aren't thirsty—did not result in a higher milk volume. Your body is incredibly efficient at prioritizing your baby. It will pull the resources it needs to make milk even if you are slightly under-hydrated.

Does Drinking More Water Increase Milk Supply?

The short answer is no; drinking "extra" water—meaning more than what your body asks for—will not act as a magic booster for your supply. If you are already well-hydrated, adding another three liters of water to your daily routine won't suddenly double your milk production.

That said, being severely dehydrated is a different story. If your body is starving for fluids, your overall health can suffer. Dehydration can lead to fatigue, headaches, and increased stress. When you are physically exhausted and stressed, your body’s let-down reflex (the process that releases milk from the breasts) can become less efficient. So, while more water won't "make" more milk, staying hydrated ensures your body has the energy it needs to function at its best.

Why the Myth Persists

The reason this advice is so popular is that many breastfeeding parents do feel incredibly thirsty. When your baby latches, your body releases a hormone called oxytocin. This hormone is responsible for the let-down reflex, but it also triggers a thirst response in your brain. It is very common to feel a sudden, intense need for a drink the moment you start nursing or pumping.

Because moms feel thirsty, they drink more water. When their supply is healthy, they credit the water. In reality, the thirst is a side effect of the breastfeeding process, not the primary driver of the milk itself.

How Your Body Actually Makes Milk

To understand how to truly increase your supply, it helps to understand how milk production works. It is not a plumbing system where you pour water into the top and it comes out the bottom. Instead, it is a hormonal and demand-driven process.

The Role of Prolactin and Oxytocin

Two main hormones drive your breastfeeding journey. Prolactin is the hormone responsible for making the milk. Every time your baby nurses or you use a pump, your prolactin levels rise, telling your breasts to create more milk for the next feed.

Oxytocin is the "feel-good" hormone that makes the milk flow. It causes the tiny muscles around your milk ducts to contract, pushing the milk out toward the nipple. Stress, pain, and extreme fatigue can sometimes inhibit oxytocin, making it harder for your milk to "let down," even if your breasts are full.

The Law of Supply and Demand

The most important factor in milk production is "supply and demand." Your breasts are never truly "empty," but they act like a factory that produces milk based on how much is removed.

When milk is removed: Your body receives a signal that the baby is hungry and it needs to make more.
When milk stays in the breast: A protein called Feedback Inhibitor of Lactation (FIL) builds up. This protein tells your body to slow down production because the "storage" is full.

If you want to increase your supply, the most effective way is to remove milk more frequently and more thoroughly. Drinking water helps keep the "factory workers" (your cells) healthy, but it doesn't place the "order" for more milk.

Key Takeaway: Milk production is driven by the frequent and effective removal of milk from the breast, not by the amount of water you consume beyond your thirst.

How Much Should You Drink While Breastfeeding?

If extra water doesn't increase supply, how much should you actually be drinking? You do need more fluids than the average person. Most health experts recommend that breastfeeding parents aim for about 128 ounces (roughly 16 cups) of total fluid daily.

This sounds like a lot, but remember that fluid comes from several sources:

Plain water
Hydrating foods (like watermelon, cucumbers, and oranges)
Other beverages like milk, juice, or lactation drinks

Listen to Your Body

The best gauge for hydration is your own body. You do not need to carry a gallon jug and force yourself to finish it by noon. Instead, pay attention to these signs:

Thirst: Drink whenever you feel thirsty. A great habit is to drink a large glass of water every time you sit down to nurse or pump.
Urine Color: Your urine should be pale yellow. If it is dark orange or has a strong smell, you likely need more fluids.
Physical Feelings: If you feel dizzy, have a dry mouth, or have frequent "brain fog" or headaches, you may be dehydrated.

Using Hydration Support

Sometimes plain water gets boring, especially when you are trying to hit high hydration goals. We developed Pumpin Punch™ and Milky Melon™ as delicious ways to stay hydrated while also getting ingredients that support lactation. These drinks provide hydration plus nutrients that many moms find helpful during their breastfeeding journey.

Real Ways to Increase Your Milk Supply

If you have been drinking water and haven't seen a change, it is time to look at other strategies. Remember, we are here to support you, and many parents have been exactly where you are right now. Every drop counts, and there are many ways to encourage your body to produce more.

1. Increase Feedings or Pumping Sessions

Since supply is driven by demand, you may need to "demand" more. If you are nursing, try adding an extra session or letting the baby nurse for longer. If you are pumping, consider adding a session in the middle of the night or early morning. Prolactin levels are naturally highest between 2:00 AM and 5:00 AM, so milk removal during this time can have a big impact on your overall supply.

2. Practice Power Pumping

Power pumping is a technique designed to mimic a baby’s cluster feeding. Cluster feeding is when a baby wants to nurse very frequently for a few hours, usually in the evening. This behavior tells your body that a growth spurt is happening and it needs to ramp up production. If you want a deeper explanation of this pattern, our guide on cluster feeding and milk supply breaks down the science.

To power pump:

Pump for 20 minutes.
Rest for 10 minutes.
Pump for 10 minutes.
Rest for 10 minutes.
Pump for 10 minutes.

This hour-long session once a day for a few days can often signal your body to increase its output.

3. Ensure a Deep Latch

If your baby is not latching deeply, they may not be removing milk efficiently. When milk is left behind, your body thinks it doesn't need to make as much. A good latch should be comfortable and pain-free. You should see your baby’s chin pressed into the breast and their nose slightly away from it. If you are struggling with pain or feel like your baby isn't getting enough, reaching out to an IBCLC for a consultation is a great next step. Our Certified Lactation Consultant breastfeeding help page is a good place to start.

4. Focus on Nutrition

While water is important, your body also needs calories to produce milk. Breastfeeding burns about 500 extra calories a day. If you are undereating or trying to diet too strictly, your supply may dip. Focus on a varied diet rich in proteins, healthy fats, and complex carbohydrates.

Our Emergency Lactation Brownies are a favorite for a reason. They are packed with ingredients like oats and flaxseed, which are traditional galactagogues (foods that may help support milk supply). Plus, they are a delicious way to make sure you are getting the extra calories you need while managing a busy schedule.

5. Skin-to-Skin Contact

Never underestimate the power of cuddling. Spending time skin-to-skin with your baby releases a massive amount of oxytocin. This hormone helps your milk flow more easily and strengthens the bond between you and your little one. Try "baby-wearing" or just spending an afternoon snuggling in bed with your baby.

What to do next:

Set a goal to drink one glass of water every time you nurse or pump.
Check your baby's latch or your pump flange size to ensure efficient milk removal.
Add one extra milk removal session (pumping or nursing) to your daily routine.
Try a lactation-supportive snack like our Oatmeal Chocolate Chip Lactation Cookies.

Common Obstacles to a Healthy Milk Supply

Sometimes, despite your best efforts with hydration and nutrition, you might see a dip in supply. Identifying these obstacles early can help you pivot and find a solution.

Stress and Anxiety

We know it is hard to "just relax" when you have a newborn. However, high levels of cortisol (the stress hormone) can interfere with your oxytocin levels. If you are stressed, your body may struggle to release the milk it has already made. Finding small ways to lower your stress, like asking a partner to handle a diaper change or taking a warm shower, can actually help your milk flow better.

Certain Medications and Herbs

Some over-the-counter medications, especially decongestants containing pseudoephedrine, can significantly dry up milk supply. Always check with your healthcare provider before taking new medications. Additionally, some herbs like sage, parsley, and peppermint, when consumed in very large quantities, can potentially decrease supply for some people.

Returning to Work or Schedule Changes

When you return to work or your baby starts sleeping longer stretches, your body may notice the decrease in milk removal. If you are away from your baby, it is vital to pump as often as the baby would typically eat to maintain that "demand" signal.

The Importance of Self-Care for the Breastfeeding Mom

You deserve support, not judgment. While the focus is often on the baby, your well-being matters just as much. A healthy, happy parent is better equipped to navigate the challenges of breastfeeding.

Sleep and Rest

We know sleep is a luxury in the early days. However, extreme exhaustion is a major stressor for the body. Try to rest when the baby rests, even if it’s just for twenty minutes. Your body does the hard work of tissue repair and hormone regulation during sleep, which indirectly supports your milk production.

Emotional Support

Breastfeeding is natural, but it doesn't always come naturally. It is a skill that both you and your baby are learning together. Surround yourself with people who encourage you. Whether it's a partner, a friend, or an online community, having someone to talk to can make the hard days feel more manageable.

At Milky Mama, we believe in empowering families with the knowledge they need to succeed. If you ever feel overwhelmed, remember that "every drop counts." Whether you are exclusively breastfeeding, pumping, or supplementing, you are doing an amazing job.

When to Seek Professional Help

Sometimes, no amount of water, cookies, or power pumping is enough to solve a supply issue. There may be underlying medical reasons, such as hormonal imbalances (like thyroid issues or PCOS) or retained placenta, that require professional intervention.

If you notice the following signs, please reach out to your doctor or a certified lactation consultant:

Your baby is not gaining weight or is losing weight.
Your baby has fewer than six wet diapers in a 24-hour period (after the first week).
You feel significant pain during every feeding.
Your baby seems excessively lethargic or difficult to wake for feeds.

Professional support can provide a personalized plan tailored to your specific body and your baby’s needs. If you want one-on-one guidance, our breastfeeding help page explains how our lactation consultations work.

Summary of Hydration and Lactation

While the answer to "does drinking more water increase milk supply" is generally no, the importance of hydration cannot be ignored. You should drink to satisfy your thirst and keep your body functioning well, but don't feel like you must drown yourself in water to be a "good" breastfeeding parent.

Focus on the proven methods of increasing supply: frequent milk removal, good nutrition, managing stress, and seeking support when you need it. Your body was literally created to feed your baby, and with the right tools, you can meet your breastfeeding goals.

"Your well-being is the foundation of your breastfeeding journey. Hydrate for your health, nurse for your baby, and trust that you are doing enough."

Conclusion

Staying hydrated is a vital part of maternal wellness, but it isn't a substitute for the physiological demand required to make milk. By focusing on frequent milk removal and nourishing your body with high-quality calories and fluids, you give yourself the best chance for success. We are proud to be a part of your journey, offering everything from our Pumpin Punch™ to our supportive educational resources. You’ve got this, and we’re here to help you every step of the way.

For more support and products designed to nourish your lactation journey, explore our full range of lactation treats and supplements. Remember, you are doing an amazing job for your baby.

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

FAQ

Does dehydration cause a permanent drop in milk supply?

No, a brief period of dehydration usually only causes a temporary dip in supply or makes it harder for your milk to let down. Once you rehydrate and continue to remove milk frequently, your supply should typically bounce back within a day or two.

Can I drink too much water while breastfeeding?

Yes, it is possible to over-hydrate, which can lead to a condition called hyponatremia where your electrolyte levels become dangerously low. Drinking far beyond your thirst does not help milk production and can actually make you feel more fatigued and unwell.

What are the best drinks for breastfeeding besides water?

Aside from plain water, you can stay hydrated with coconut water, herbal teas (check for breastfeeding safety), and specialized lactation drinks. Our Pumpin Punch™ and Milky Melon™ are specifically formulated to provide hydration along with supportive ingredients for nursing parents.

Why am I so thirsty while I am breastfeeding?

Subscribe & Save: 10% off

SHOP NOW

About Milky Mama

Support

Stay Connected