Powdered infant formula is not sterile. It could contain bacteria that can cause serious illness to your baby. By preparing and storing formula properly and sterilizing bottles, you can reduce the risk of infection.
Here are some tips for keeping bottle-feeding safe for your baby:
• Boil bottles and nipples for 5 minutes before you use them for the first time. After the first use, wash them for 1 minute in hot, soapy water and rinse after each use. This removes harmful bacteria that can grow and make your baby sick.
• To be sure your baby’s formula is sterile, feed her prepared liquid formula, especially when she is a newborn.
• Wash your hands before preparing each bottle.
• When you first open your formula container, make sure it is sealed properly. If it is not sealed, return it to the store.
• Check the “Use By” date on the formula package. Do not use it if it has expired.
If you are using powdered formula:
• The safest way to prepare formula is to boil the water before use. Allow the water to cool down before mixing with formula. If you do not boil the water, prepare the formula with sterilized bottled water.
• Avoid mixing up large amounts of formula at one time.
• Be sure to use the right amount of water to mix with your baby’s formula. Read the directions on the packaging label. Too much water may keep your baby from getting the right amount of nutrients she needs to grow. Too little water may cause diarrhea or dehydration.
For all bottles:
• Don’t heat formula in the microwave. Some parts can heat up more than others and burn your baby. You can warm or cool the bottle by holding it under running water. Make sure the running water is below the lid of the bottle. Then, shake the bottle to mix the formula to avoid hot spots.
• To keep bacteria from growing, don’t leave formula out of the refrigerator for more than 2 hours. If you do not plan to feed your baby right away, refrigerate the bottle until the feeding.
• If you plan to make a bottle of formula in advance to use later, prepare the feedings separately and put them in the refrigerator until they are needed. Throw away unused formula that has been in the fridge for more than 24 hours.
• If your baby does not finish the entire bottle of formula, discard the remaining formula.
• If you are traveling, keep the prepared formula cold by placing the bottle in a lunch bag with ice packs.
For more information on how to prepare bottles safety, visit the World Health Organization’s guidelines for cleaning, sterilizing & storing. For information about formulas and what to ask your baby’s doctor, visit our website.
For information on safe handling and storage of breast milk, visit our blog.
If you have questions about bottle-feeding safety or other pregnancy and newborn health questions, email us at AskUs@marchofdimes.org