Sour Milk: Why Are Mums Being Told Their Milk Isn’t Good Enough?

I’ve been wanting to write this for a long time, but after speaking to a mother, poised with a bottle of formula in her hand last night I thought, I need to do this. The mother I spoke to was doing amazingly well, her baby was doing amazingly well, but every evening just as the mother was ready to wind down for the day, the baby would come alive. Just as she had brewed a hot cup of tea, it began, the cluster feeding. 

This mother knew what signs to look for to know that feeding was going well. She was seeing them, but this bit of the day was tough. She had vented to a few family and friends about the intensity of the evenings with her newborn, most of whom all said in one way or another that maybe her milk wasn’t good enough at the end of the day. This had led her to the conclusion that her baby needed that bottle or formula that she was there poised with as it had ‘better nutrition’. 

Now if you’ve had a baby, you have probably been that mother, with your cold tea sitting on the windowsill, and you have also probably been that mum who has had someone ‘helpfully’ suggest that your baby might still be hungry because your ‘breast milk quality isn’t good  enough.’

 Charming, isn’t it?

Let’s get one thing straight: breast milk doesn’t come in ‘full-fat’,  ‘semi-skimmed’ and it definitely isn’t ‘off’. Despite what Aunt Doris, a stranger in Tesco, or even the odd healthcare professional might suggest, your body knows exactly what it’s doing. So why are so many mums being told that their milk isn’t good enough?

The Science Bit (Don’t Worry, It’s Simple)

Breast milk is incredible. It’s made on demand in harmony with your baby. Every feed contains the perfect balance of fat, protein, carbohydrates, water, antibodies, hormones, and enzymes and more tailored to your baby. It adapts and changes through individual feeds, days, weeks months, years.

So, how does milk production actually work?

Your milk works on a supply and demand system.

The more your baby feeds, the more milk your body makes.

Less feeding, baby struggling to feed or supplementing with bottles? Your body gets the message to slow down.

In the early days, your body produces colostrum,liquid gold packed with immune power. Then around day 2–4, your milk ‘comes in’ and grows in volume.

Milk is made in your breast tissue by small structures called alveoli, which are kind of like little milk factories. When your baby suckles, it triggers the let-down reflex, which releases the milk. The more the milk is removed, the more those little factories get to work.

Here’s the simplified rule: 

Empty breast = more milk made. 

Full breast = milk production slows.

So when your baby is feeding often? That’s them placing an order for more milk tomorrow. Not a sign that your milk isn’t enough today.

So, Where Did the “Not Good Enough” Myth Come From?

Let’s be honest, formula marketing hasn’t helped. For decades, ads have pushed the idea that formula is more ‘complete’ or ‘scientific’. Add in generations of really poor breastfeeding education and understanding and the glorification of sleeping through the night (spoiler- that’s not how newborns work), and voilà- Mums start to doubt themselves.

Add to that societal pressures, to be the perfect parent , lack of postnatal  support, and conflicting advice from professionals, and it’s no wonder you start to wonder if your milk is somehow faulty.

But What If My Baby Feeds… 

All the Time?

Cluster feeding (when babies feed frequently, often in the evenings)- Totally normal- this is how they increase your milk supply. It’s not a sign your milk is ‘thin’ or ‘not enough’, it’s a clever biological trick. Your baby is placing an order for more milk tomorrow. Maybe if we look back in time to when we lived in caves, when the sun went down and the animals came out was when it was safest for babies to be held close in their mothers arms? 

Growth spurts, developmental leaps, and the need to be close  are totally normal reasons babies feed often. Breastfeeding is more than just food, it’s warmth, regulation, safety, and closeness… it’s LOVE.

When Help is Helpful

That said, breastfeeding can be tough. Pain, latching troubles, babies struggling to get enough milk, or oral function issues can and do happen. If your baby really is feeding alllll the time, around the clock, if they aren’t gaining weight, if breastfeeding is feeling tough in any way, if you’re struggling, see a breastfeeding specialist and ask about their qualifications. Get help! 

Trust the Process (And Your Boobs)

Your milk is not sour. It’s not watery. It’s not second best. It’s designed by you, upgraded daily, and uniquely made for your baby. We just live in a world that doesn’t always support it properly.

So next time someone questions your milk, smile sweetly, offer them a sip of your cold tea, ask them to make you a lasagne and remember: your body is doing something incredible. Every Single. Day.