Trusting someone else with your breast milk is a big deal — we get it Mama. So before you send off your precious stash, it's only fair to ask: is freeze-dried breast milk actually safe? Let's look at what the research and the process tell us.

What the Research Shows

Studies on freeze-dried donor milk have found that the process preserves nutritional and immunological value while maintaining microbiological safety — in some cases, freeze-drying has even been shown to retain antibacterial properties better than conventional deep-freezing. Because no heat is used, delicate proteins, antibodies and enzymes stay largely intact.

How Safety Is Built Into the Process

Safety isn't just about the science — it's about how your milk is handled from the moment it leaves your freezer. Your milk should always be processed individually, sealed in a dedicated pouch, and never pooled with anyone else's. Water activity testing on every batch confirms the powder is dry enough to be shelf-stable before it's packaged and sent home.

What You Can Do at Home

Safety is a two-way street. Sending your milk frozen solid, in good-quality bags, with clear labelling all help your freeze-drying provider do their job properly — and give you extra peace of mind that your stash is protected from start to finish.

You can read more of the underlying research on our Research & Resources page, or see exactly how we keep your milk safe on our facility and safety standards page.