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To eat dairy even though my breastfed baby is lactose intolerant?

36 replies

RadioSilencio · 20/11/2025 13:43

I had a thread a couple of weeks ago about the baby having horrendous nappy rash and green, frothy poo. Went to the GP and had a stool sample done, so it's come back with a confirmed lactose intolerance.

But the only advice was to keep to an exclusion diet (I'd given up dairy thinking it was CMPA) and a link to what lactose intolerance is.

My dilemma is, I am a mammal, so I produce lactose. I have got some coleif lactose drops and they do seem to be helping. I have also pumped a few times and then fed from that boob (to get rid of the thin lactose heavy fore milk, or at least, that's my theory!).

But if the baby's not actually CMPA, then the advice seems to be that I don't need to follow an exclusion diet, and can have dairy.

My GP isn't very good with this stuff, I went in initially saying about lactose intolerance and was dismissed (so I feel a bit vindicated). They also insisted that lactose allergy and dairy intolerance were the same thing.

Anyone been through anything similar?

OP posts:
RadioSilencio · 20/11/2025 14:13

AmIALoser · 20/11/2025 14:10

If you’ve had to cut out dairy and are breastfeeding, the GP should have prescribed high dose calcium/vitamin D tablets for you.

(edited to add a comma so it didn’t read that you were breastfeeding the GP)

Edited

They haven't done that either. I got some vitamin D tablets a couple of days ago. That might explain the mouth full of ulcers.

OP posts:
RadioSilencio · 20/11/2025 14:10

Agix · 20/11/2025 13:48

No kids and no experience, but a quick Google search shows you don't have to stop eating dairy. It doesn't make any difference.

https://www.breastfeeding.asn.au/resources/lactose-intolerance-and-breastfed-baby

This, and various other Google's, is what I'm going off. That surely CMPA was tested for and ruled out, lactose intolerance was found, so I can go back on dairy.

OP posts:
AmIALoser · 20/11/2025 14:10

If you’ve had to cut out dairy and are breastfeeding, the GP should have prescribed high dose calcium/vitamin D tablets for you.

(edited to add a comma so it didn’t read that you were breastfeeding the GP)

TheSandgroper · 20/11/2025 14:09

Eating something that doesn’t agree with your baby certainly affects mum. If OP can breastfeed her baby with no reaction, all power to her, but if she does keep feeding and the reaction doesn’t stop, then a process of diet elimination will be needed.

As with so many things, books can say one thing but experience shows another.

RadioSilencio · 20/11/2025 14:08

JinglingtoChristmas · 20/11/2025 13:49

Your GP seems a bit clueless. Have they made an urgent referal to a paediatric dietitian?

They have not. Literally got a text with the results and "if breastfeeding mum to use exclusion diet, lactose free formula is not available on prescription".

I've got the six week mum/baby check next week (with a different doctor) and I won't get an appointment before then so I was going to ask at this about dietician appointment. Because baby isn't "unwell" it seems to not be a massive priority.

OP posts:
dementedpixie · 20/11/2025 14:03

@TheSandgroper eating or not eating dairy wont affect the lactose content of breastmilk so the OP is free to eat dairy as it will not make any difference as breastmilk naturally contains lactose anyway

VikaOlson · 20/11/2025 14:01

TheSandgroper · 20/11/2025 14:00

Yeah, well, this anecdotal experience here is that what you eat goes to your baby. That includes gluten and dairy.

Neither dd nor I could manage cows milk for many years but we’re fine with sheep or goat cheese.

The baby isn't allergic to gluten or dairy though.

TheSandgroper · 20/11/2025 14:00

Agix · 20/11/2025 13:48

No kids and no experience, but a quick Google search shows you don't have to stop eating dairy. It doesn't make any difference.

https://www.breastfeeding.asn.au/resources/lactose-intolerance-and-breastfed-baby

Yeah, well, this anecdotal experience here is that what you eat goes to your baby. That includes gluten and dairy.

Neither dd nor I could manage cows milk for many years but we’re fine with sheep or goat cheese.

Chocolateaddict999 · 20/11/2025 13:56

Hey,

I personally haven’t been through this myself but has it been this way since birth or is this a more recent development? I always found this Aussie website had good info on things I maybe it will help

https://www.breastfeeding.asn.au/resources/lactose-intolerance-and-breastfed-baby

Lactose intolerance and the breastfed baby | Australian Breastfeeding Association

Removing dairy from your diet makes no difference. Get the facts on lactose intolerance.

https://www.breastfeeding.asn.au/resources/lactose-intolerance-and-breastfed-baby

JinglingtoChristmas · 20/11/2025 13:49

Your GP seems a bit clueless. Have they made an urgent referal to a paediatric dietitian?

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