Colostrum — What It Is + Why It’s Called Liquid Gold
If you’re pregnant or newly postpartum, you’ve probably heard the term colostrum tossed around.
Usually it’s described as “your first milk.”
Which is true—but also wildly undersells what it actually does.
Let’s break it down so you understand not just what colostrum is, but why it matters so much in those early days.
What is colostrum?
Colostrum is the first milk your body makes, starting during pregnancy and continuing in the first few days after birth before transitioning to mature milk.
It looks different than what most people picture when they think of milk:
Thick and sticky
Yellow or golden in color
Produced in very small amounts
And every part of that is intentional.
Why is there so little?
This is one of the biggest concerns we hear from parents.
“Is baby getting enough?”
Here’s the key: newborn stomachs are tiny.
On day one, your baby’s stomach is about the size of a cherry. That means they only need very small amounts at a time.
Colostrum is perfectly matched to that:
Highly concentrated
Easy to digest
Delivered in small volumes
It’s not a supply issue—it’s a design feature.
Why is it called “liquid gold”?
Colostrum is packed with components that do far more than just provide calories.
It contains:
High levels of antibodies that help protect your baby from infection
White blood cells that actively fight bacteria and viruses
Factors that help seal and protect the gut lining
Nutrients tailored specifically for a newborn’s immature digestive system
It acts as your baby’s first immune support system while their own is still developing.
What does colostrum actually do?
In those first days, colostrum is working behind the scenes in some really important ways:
1. Protects the gut
It coats the digestive tract, helping create a barrier against harmful bacteria.
2. Helps pass meconium
Colostrum has a natural laxative effect that helps your baby pass their first stools, which also plays a role in reducing jaundice risk.
3. Supports stable blood sugar
Frequent small feeds of colostrum help keep your baby’s blood sugar regulated.
4. Seeds the microbiome
It introduces beneficial bacteria that support long-term gut health.
This isn’t just feeding—it’s foundational development.
What about hand expression?
Many parents are surprised to learn that colostrum can often be hand expressed, sometimes even before baby arrives (in appropriate situations).
Hand expression can:
Help you become familiar with your body before birth
Allow you to collect small amounts of colostrum to have on hand
Be especially helpful in situations where baby may need extra support after delivery
It’s a simple but powerful tool when used correctly and at the right time.
(We always recommend learning this with guidance so you feel confident doing it safely.)
Why learning this before birth matters
Here’s the reality: most feeding challenges don’t come from a lack of effort—they come from a lack of clear, practical information ahead of time.
When you understand:
What normal intake looks like
How often baby should be feeding
What to expect from your body
When to trust the process vs when to get support
You walk into those early days with confidence instead of second-guessing everything.
👉 Our Prenatal Breastfeeding Classes in the Phoenix Valley and Everywhere Onlineare designed to give you this exact foundation before baby arrives.
Want support before baby arrives?
A prenatal visit gives you a plan, not just information.
We walk you through:
What to expect in the first hours and days
How to support feeding from the start
How to use tools like hand expression effectively
How to troubleshoot common concerns before they become overwhelming
And yes—many insurance plans cover it.
If you’re ready to feel prepared instead of reactive, we’d love to support you.
Because those first days?
They matter—and you don’t have to figure them out alone 🤍