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Does freeze drying breast milk get red of lipase? Freeze drying breast milk is a popular method for long-term storage and preservation. One common concern among breastfeeding mothers is the presence of lipase enzyme, which can cause a soapy or metallic taste in the milk. In this article, we will explore whether freeze drying effectively gets rid of or inhibits the lipase enzyme and whether it improves the quality and taste of breast milk.

Key Takeaways:

  • Freeze drying breast milk is a method for long-term storage.
  • Lipase enzyme can cause an unpleasant taste in breast milk.
  • We will explore whether freeze drying removes lipase and improves milk quality.

Understanding Lipase in Breast Milk

Lipase is an enzyme naturally present in breast milk, and it plays a vital role in the digestion process of infants. Its primary function is to break down fats into smaller molecules, known as fatty acids and glycerol, which are more easily absorbed and utilized by the baby’s body. Lipase ensures that the fats present in breast milk are in a form that the baby can adequately digest and absorb.

What is Lipase and Its Function?

Lipase is an enzyme produced in the mammary glands of breastfeeding mothers. It is secreted into breast milk to aid in the digestion of fats. When the baby consumes breast milk, lipase interacts with the fats in the milk, breaking them down into smaller components. This process, known as lipolysis, allows the baby’s digestive system to absorb the nutrients from the fats effectively.

Without lipase, the fats in breast milk would remain largely undigested, leading to potential digestive discomfort for the baby. Lipase ensures that breast milk is properly metabolized, promoting optimal nutrient absorption and overall growth and development.

Common Concerns with High Lipase Milk

While lipase is an essential enzyme in breast milk, some mothers may have higher levels of lipase in their milk than others. This can lead to concerns regarding the taste and smell of stored refrigerated or frozen breast milk.

High lipase milk can develop an unpleasant soapy or metallic taste when stored in the refrigerator or freezer. This can be concerning for breastfeeding mothers as it may affect their baby’s willingness to consume the milk. Some babies may refuse to drink high lipase milk, resulting in wasted breast milk and potential challenges in exclusively breastfeeding.

Mothers may worry about these sensory changes in their stored breast milk, especially if they plan to use expressed milk for bottle feeding or when they are unable to breastfeed directly. However, it’s important to note that high lipase milk is still safe for the baby to consume and does not pose any health risks. The taste and smell changes do not indicate spoilage or decreased nutritional value.

Understanding lipase activity and its potential impact on the quality of breast milk can help mothers make informed decisions about storage methods and address any concerns they may have about the taste and odor of their expressed milk.

Freeze Drying Deactivates Lipase Enzyme: Myth or Fact?

The impact of freeze drying on lipase activity in breast milk has been a topic of interest among breastfeeding mothers. Studies have shown that freeze drying can effectively deactivate the lipase enzyme when proper levels of water activity are achievied, and the natural sublimation of water reduces the soapy/metallic and unpleasant taste associated with high lipase milk. The process of freeze drying involves removing water from the milk, which in turn deactivates the lipase enzyme and prevents further degradation of the milk’s quality.

To better understand the impact of freeze drying on lipase activity, let’s compare it to other common preservation methods and analyze the results.

Freeze DryingTraditional FreezingHeat Pasteurization/Scalding
Lipase ActivityDeactivates lipase enzymeMaintains lipase activityNutralizes lipase when heated and held for require time
Taste and QualityPreserves taste and qualityPotential loss of taste and quality over timePotential alteration of taste, tecture and quality
Nutritional IntegrityPreserves nutritional integrityMay experience some loss of nutrientsMay experience some loss of nutrients

Comparing Freeze Drying to Other Preservation Methods

When it comes to preserving breast milk, there are various methods available. This section will compare freeze drying to two common preservation methods: traditional freezing and heat pasteurization. Understanding the differences and benefits of each method is crucial for breastfeeding mothers in making an informed decision about how to preserve their breast milk.

Traditional Freezing vs. Freeze Drying

Traditional freezing, as the name suggests, involves storing breast milk at extremely low temperatures to slow down bacterial growth and preserve the milk’s freshness. While traditional freezing is a widely used method, it has some drawbacks. One of the main challenges is the formation of ice crystals during freezing and thawing, which can potentially affect the taste, texture, and overall quality of the milk.

Freeze drying, on the other hand, is a dehydration process that involves removing water from the breast milk while retaining its nutritional properties. This method offers several advantages over traditional freezing. Firstly, freeze-dried breast milk has a significantly longer shelf life compared to frozen breast milk. Additionally, freeze drying avoids the formation of ice crystals, resulting in milk that maintains its original taste, texture, and nutritional integrity when rehydrated.

While freeze drying may require specific equipment and initial investment costs, the benefits it offers, such as improved quality and longer shelf life, make it an attractive option for many breastfeeding mothers.

Heat Pasteurization and Lipase Inactivation

Heat pasteurization is a commonly used method to deactivate lipase in breast milk. By exposing the milk to heat at a specific temperature for a set period, the lipase enzyme is neutralized, reducing the likelihood of the milk developing a soapy or metallic taste during storage.

Compared to freeze drying, heat pasteurization is a simpler and less time-consuming process. However, it is important to note that heat pasteurization can affect the nutritional content, taste and quality of breast milk to some extent. High temperatures can lead to the loss of certain enzymes and nutrients, potentially impacting the overall nutritional value of the milk.

Additionally, some breastfeeding mothers prefer freeze drying over heat pasteurization due to the longer shelf life and better overall preservation of the milk’s nutritional integrity. However, it is essential for mothers to consult with healthcare professionals or lactation consultants before deciding on a preservation method, taking into consideration their individual needs and circumstances.


In conclusion, the process of freeze drying breast milk can effectively deactivate the lipase enzyme, resulting in improved quality and taste. Companies like BoobieJuice offer freeze dried breast milk services to stop breast milk lipase break down, by removing the moisture from the milk while retaining its nutritional properties, freeze drying offers a long-term storage solution without compromising the essential nutrients. This preservation method has been found to be particularly beneficial for breastfeeding mothers who want to ensure the optimal sensory experience of their milk.

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