If you've ever thawed a bag of breast milk only to notice a soapy, metallic, or sour smell, you're not alone.

Many mothers discover they have high lipase milk when their baby suddenly refuses a bottle of previously stored milk. While the milk is still safe to feed, the change in taste and smell can make feeding frustrating for both parents and babies.

Lipase is a naturally occurring enzyme in breast milk that helps babies digest fats. For some mothers, however, lipase continues breaking down fats during storage, causing noticeable changes in flavor over time.

Traditional freezing slows this process but doesn't always stop it. That's why some parents turn to scalding their milk before storage. While scalding can deactivate lipase, it also exposes breast milk to high heat and may reduce some of the bioactive components that make human milk so unique.

Freeze-drying offers a different approach.

By removing moisture from breast milk, freeze-drying effectively halts the enzymatic activity that causes taste and odor changes. The result is shelf-stable breast milk that maintains the familiar taste profile babies expect while preserving many of the nutritional and bioactive components naturally found in human milk.

For parents navigating high lipase milk, freeze-drying can help:

• Preserve milk before taste and odor changes occur
• Avoid the need for scalding
• Maintain convenient, long-term storage
• Reduce milk waste from rejected frozen milk
• Make feeding more predictable for babies sensitive to flavor changes

At Leche, we've worked with countless mothers looking for a better way to preserve their milk. Whether you're building a freezer stash, preparing to return to work, or simply trying to avoid losing valuable milk to lipase-related taste changes, freeze-drying can provide peace of mind—and help ensure every ounce you've worked so hard to pump remains useful when your baby needs it.

Because your milk is too valuable to leave to chance.

Not producing milk but want to give your baby the benefits of breast milk? Our powdered donor breast milk is a trusted alternative — carefully screened and freeze-dried for safety and nutrition.