Adding warm milk to chilled

Pooling breastmilk

UPDATE: In September 2021, the AAP removed new guidance from their Frequently Asked Questions page within 24 hours of this post. While they did not retract their original statement, we understand that this change may be confusing. We will continue to keep up on  AAP guidance.

We live in exciting times! Although traditional medicine once ignored the power of breastmilk, recent research and established medical sources confirm that breastmilk is full of living cells, and fundamentally different from any other food.  

Mothers can mix warm milk and cold, or even consider pooling milk from 24 hours together, which may help even out variability in nutrients due to pumping time or breast emptying (which influences fat content of the milk).

The AAP has long been a trusted source for breastfeeding families and is committed to ensuring the well-being of all children. This is an excellent example of a growing, formal recognition of the quality and reliability of the research being conducted by renowned pediatricians and biochemists in the field of human milk medicine.    

Based on recently published research, pooling breastmilk over the course of a day is beneficial. Pooled breastmilk provides evenly distributed caloric feedings, is more convenient for new mothers, and is believed to decrease the risk of contamination that results from multiple containers. The study specifically showed no signs of increased bacteria from combining newly expressed milk with chilled milk from multiple pumping sessions over 24 hours.  

For many years and on many current websites, parents have been told that it is best to chill breastmilk before adding it to milk that is already cold. The reasoning on these sites is based on a general approach to foods like raw meat or processed dairy products. Searching the internet still turns up these food-based recommendations, but interestingly none of these websites cite human milk research or a scientific basis for the recommendation.

Many Ceres Chill mamas use their Chillers to pump and store their milk all day. For more information about one of the studies on pooling breastmilk, check out the Journal of Breastfeeding Medicine 

Options for every mom

Moms who want the flexibility of Ceres Chill but also want to follow the traditional recommendation to chill their milk before combining, purchase two Chillers (one to chill before combining, and one to store the combined milk all day or all night). Any two chillers can be purchased as a set at a significant discount. 

Discounted peace of mind and up to 48 ounces of storage for over 20 hours is pretty great and sure beats short-lived coolers for pumping mamas on-the-go. 

Unlike regular food,

breastmilk fights bacteria!

Every day, we learn more about the absolutely amazing properties of breastmilk. These new findings continue to improve guidance  and remove barriers for those who are breastfeeding.

Curious? Learn more:

Related videos