How to Stay Hydrated When You Are Breastfeeding

Water and other fluids count when you are nursing a baby

Young Pregnant Woman.
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When you're breastfeeding, you are hydrating your little one and yourself: Breast milk is about 90% water. Although research has found that nursing mothers do not need to drink more fluids than what's already biologically necessary to satisfy their thirst, experts recommend about 1/2 to 3/4 of an ounce of water per pound of your non-nursing weight.

What this means is that if you are a nursing mother who weighs 160 pounds, then your aim should be to drink 80 ounces (or 10 cups) of water per day at the very minimum, in addition to the fluids found in the daily intake of your food. Total fluid consumption is a combination of what you drink (water and beverages like tea, milk, and fruit juice) and eat (water-rich foods like many fruits and vegetables).

It may seem intuitive that if your milk supply starts to wane, drinking more water and other fluids will help to give it a boost. However, research on the effect of extra fluid for breastfeeding mothers on milk production, supply, and infant growth does not show that drinking more than your usual amount of fluids will increase milk supply.

Getting too little liquid can cause milk production to lag, however.

Avoiding Dehydration

What's more important than meeting a goal of a set number of ounces is making sure you don't become dehydrated. Staying hydrated by getting plenty of water and other fluids throughout the day is vital to your health, no matter what stage of life you're in (pregnant, breastfeeding, etc.).

If you don't get enough water and other fluids, you risk becoming dehydrated, which can lead to some unpleasant side effects such as:

  • Headache
  • Moodiness
  • Dry mouth and chapped lips
  • Nausea
  • Muscle cramps
  • Dizziness
  • Fatigue and a lack of energy
  • Constipation

Your top indicator of whether you need more fluids is thirst. By the time you're physically craving water, your body is already depleted of fluid.

Soon after starting to nurse, you will notice that you feel thirsty more often. This is triggered by oxytocin, a hormone released during breastfeeding, which naturally ensures that you are getting enough water to hydrate yourself and make breast milk.

The color of your urine is a telling clue about your level of hydration. If your pee is dark, it isn't being diluted enough by what you drink. Look for a pale yellow or almost clear color to your urine, which indicates you're getting enough fluids.

All Liquids Count

Your fluids don't have to all come from water, but water is the best place to start since it is sugar-, caffeine-, and calorie-free.

That said, any liquids you consume, along with any juicy foods you eat, will contribute to your overall fluid intake. Some examples include:

  • Milk or almond milk by the glass or in your cereal
  • Decaffeinated coffee or tea (a cup or two a day with caffeine is likely fine)
  • Fruit or vegetable juice
  • Fruits such as oranges, watermelon, and berries
  • Soup
  • Vegetables such as tomatoes, cucumbers, and lettuce

If you don't care for cow's milk, don't worry. You don't need it in your diet to make breast milk. Just be sure you are getting calcium from other sources, such as cheese, yogurt, green leafy vegetables, or fortified orange juice.

Drink When Your Baby Drinks

Since newborns breastfeed about 8 to 12 times a day, having a glass of water before or after every feeding is a good way to get your daily quota without having to think about it.

Don't Overdo It

Know, however, that consuming too much fluid to get your pee to run clear can actually harm your milk supply. Your body works to restore the electrolyte balance in your body by dumping excess water in your urine. This diverts water away from your breasts, which can actually decrease your milk supply.

Drinks to Limit When Breastfeeding

It's true that you'll need to take in extra calories to support milk production while you're nursing, but those calories should come from foods and beverages that are dense in nutrients. Experts recommend that you avoid or limit the following liquids when nursing.

Sugary Sodas and Fruit Drinks

Beverages that contain a lot of sugar, such as soda, can actually reduce the amount of fluid that your body actually retains. This can further exacerbate dehydration, causing heat stress and putting pressure on the kidneys, according to a study that examined the effects of such beverages.

If you are really craving a sweet drink, try adding fruits and berries to your water. If you are still missing that sweetness, you are better off adding a teaspoon of plain table sugar to your fruit-infused water than drinking a can of soda, which has about 9.5 teaspoons of sugar per can.

Note: Fruit drinks contain little or no actual fruit juice. (They are often labeled as "drinks," "coolers," or "punches.") These are different from 100 percent fruit juice, which is still a good choice for hydration.

Caffeinated Drinks

Aside from caffeine passing into breast milk and affecting your baby's mood and sleep, the stimulant is also a diuretic, which means it causes you to lose fluid and can have a dehydrating effect on your body.


There are many misconceptions regarding alcohol and breastfeeding, including that it will help to boost your milk supply. The truth is, alcohol is more likely to inhibit the letdown reflex.

It's generally OK (with the go-ahead from your baby's pediatrician and your own obstetrician) to have an occasional glass of wine or beer while you're breastfeeding, but it's best to stop there. If you're in the mood for a cocktail, add a splash of non-sugar-added fruit juice to plain seltzer and drink it from a champagne flute.

A Word From Verywell

Keep in mind that water intake varies per individual and your needs may be more than the recommended 10 glasses a day suggested above, especially in hot weather or if you are more active than the average person. Drink to thirst and check your urine to determine the right amount of water for you.

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